Ex Parte Zohar et alDownload PDFPatent Trial and Appeal BoardSep 3, 201411525420 (P.T.A.B. Sep. 3, 2014) Copy Citation UNITED STATES PATENT AND TRADEMARK OFFICE UNITED STATES DEPARTMENT OF COMMERCE United States Patent and Trademark Office Address: COMMISSIONER FOR PATENTS P.O. Box 1450 Alexandria, Virginia 22313-1450 www.uspto.gov APPLICATION NO. FILING DATE FIRST NAMED INVENTOR ATTORNEY DOCKET NO. CONFIRMATION NO. 11/525,420 09/22/2006 Ronen Zohar ITL.1426US (P24841) 1554 21906 7590 09/03/2014 TROP, PRUNER & HU, P.C. 1616 S. VOSS ROAD, SUITE 750 HOUSTON, TX 77057-2631 EXAMINER CALDWELL, ANDREW T ART UNIT PAPER NUMBER 2183 MAIL DATE DELIVERY MODE 09/03/2014 PAPER Please find below and/or attached an Office communication concerning this application or proceeding. The time period for reply, if any, is set in the attached communication. PTOL-90A (Rev. 04/07) UNITED STATES PATENT AND TRADEMARK OFFICE ____________________ BEFORE THE PATENT TRIAL AND APPEAL BOARD ____________________ Ex parte RONEN ZOHAR and SHANE STORY ____________________ Appeal 2012-003411 Application 11/525,420 Technology Center 2100 ____________________ Before ELENI MANTIS MERCADER, JOHN G. NEW, and JOHN F. HORVATH, Administrative Patent Judges. HORVATH, Administrative Patent Judge. DECISION ON APPEAL Appeal 2012-003411 Application 11/525,420 2 STATEMENT OF THE CASE Appellants file this under 35 U.S.C. § 134(a) from a final rejection of claims 1–8, 10–12, 14–16, 18, 20, 22, 24–26, 28–31, 37 and 38. We have jurisdiction under 35 U.S.C. § 6(b). We affirm. SUMMARY OF THE INVENTION Appellants’ claimed invention is directed to rounding a floating point number responsive to a received rounding instruction having an immediate value that has separate fields for an override indicator and a rounding mode (see Abstract). Claim 1, reproduced below, is illustrative of the claimed subject matter: 1. A method comprising: receiving a user-level rounding instruction of an instruction set architecture (ISA) having a format including a source operand, a destination operand and an immediate value, in a control selector unit of a processor; determining if a rounding mode override indicator of the immediate value is active by decoding the immediate value in the control selector unit; if so, obtaining a rounding mode field of the immediate value, the rounding mode field separate from the override indicator, and dispatching the source operand and information to control a rounding mode to a floating point unit of the processor coupled to the control selector unit; and executing a rounding operation on a source operand in the floating point unit of the processor responsive to the user- level rounding instruction and according to the information. Appeal 2012-003411 Application 11/525,420 3 REFERENCES AND REJECTIONS 1. The Examiner rejected claims 1–8, 10–12, 14–16, 18, 20, 22, 24–26, 28– 31, 37 and 38 under 35 U.S.C. § 112 ¶ 1 for failing to comply with both the Written Description and Enablement Requirements. 2. The Examiner rejected claims 1–5, 7, 8, 10, 11 and 14–16 under 35 U.S.C. § 103(a) as unpatentable over Boggs1 in view of Smith2 and further in view of Tanenbaum.3 3. The Examiner rejected claims 25, 26, 28–31, 37 and 38 under 35 U.S.C. § 103(a) as unpatentable over Boggs in view of Smith and further in view of Tanenbaum. 4. The Examiner rejected claims 6, 12, 18, 20, 22 and 24 under 35 U.S.C. § 103(a) as unpatentable over Boggs in view of Smith and further in view of Hansen.4 ISSUES Whether the Examiner has erred in finding that: A. Appellants have failed to provide sufficient written description in the Specification to support the claims; B. Appellants have failed to enable the inventions recited in the claims to a person of ordinary skill in the art; C. Boggs, Smith and Tanenbaum, in combination, teach a user-level rounding instruction having an immediate value that includes separate rounding mode indicator and rounding mode fields as required by claim 1; 1 US Patent Pub. No. 20060095714 A1 published May 4, 2006 2 US Patent No. 5,696,709 issued Dec. 9, 1997 3 Andrew S. Tanenbaum, Structured Computer Organization 11 (2nd ed. 1984) 4 US Patent No. 5,812,439 issued Sept. 22, 1998 Appeal 2012-003411 Application 11/525,420 4 D. Boggs, Smith and Tanenbaum, in combination, teach adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold as required by claim 25; E. Boggs, Smith and Hansen, in combination, teach a rounding instruction having an immediate value that includes a precision exception indicator field as required by claim 6; and F. Boggs, Smith and Hansen, in combination, teach a status register that stores a default round mode and status information indicating a precision exception. ANALYSIS A. Whether Appellants have failed to provide sufficient written description in the Specification to support the claims. Appellants argue that the claims are adequately supported by the Written Description, and that the Examiner has failed to identify any aspect of any of the claims that is not so supported (App. Br. 18). The Examiner finds the claims lack Written Description because they recite subject matter that was not described in the Specification in such a way as to reasonably convey to a person of skill in the art at the time of Appellants invention that Appellants had possession of their invention (Ans. 25). We agree with Appellants. Although the Examiner has stated the well-known test to determine whether claims satisfy the Written Description requirement, see Vas-Cath Inc. v. Mahurkar, 935 F.2d 1555, 1563 (Fed. Cir. 1991), the Examiner has not identified a single limitation alleged to be lacking Written Description support, nor provided any explanation or analysis tending to show that Appellants were not in possession of their invention at the time their application was filed. In the absence of such Appeal 2012-003411 Application 11/525,420 5 evidence, we find the Examiner has failed to establish a prima facie case that the claims are invalid under 35 U.S.C. § 112 ¶ 1 for lack of Written Description, and reverse the Examiner’s rejection of the claims on this basis. B. Whether Appellants have failed to enable the inventions recited in the claims to a person of ordinary skill in the art. Appellants argue that all pending claims are enabled since the Specification discloses and describes multiple block diagrams and flow charts illustrating the operations performed and the hardware involved at a level of detail sufficient to allow a person of ordinary skill in the art to make and use the invention without undue experimentation (App. Br. 16, 17). The Examiner finds the claims lack enablement because Appellants have maintained that the cited prior art, which the Examiner finds provides the same level of detail as the Specification, is insufficient to render Appellants invention obvious (Ans. 25–27). We agree with Appellants. To reject a claim for lack of enablement, the Examiner “bears an initial burden of setting forth a reasonable explanation as to why [he] believes that the scope of protection provided by that claim is not adequately enabled by the description of the invention provided in the specification of the application.” In re Wright, 999 F.2d 1557, 1561-62, 27 USPQ2d 1510, 1513 (Fed. Cir. 1993). The Examiner has not met that burden here. In the absence of sufficient evidence, we find the Examiner has failed to establish a prima facie case that the claims are invalid under 35 U.S.C. § 1112 ¶ 1 for lack of enablement, and we reverse the Examiner’s rejection of the claims on this basis. Appeal 2012-003411 Application 11/525,420 6 C. Whether Boggs, Smith and Tanenbaum, in combination, teach a user- level rounding instruction having an immediate value that includes a separate rounding mode indicator and rounding mode fields. Appellants contend that the combination of Boggs, Smith and Tanenbaum does not teach “a user-level rounding instruction of an instruction set architecture and an immediate value,” or making a “determination . . . whether a rounding mode indicator of [the] immediate value is active, and if so executing the rounding operation according to a rounding mode field of the immediate value” (App. Br. 11–13). Appellants proffer several arguments in support of their contention. First, Appellants argue that the combination of Boggs, Smith and Tanenbaum teaches away from receiving a user-level rounding instruction because Boggs teaches a complex clipping instruction that includes a rounding instruction (App. Br. 11–14). We are not persuaded by Appellants’ argument. The Examiner finds, and we agree, that through a judicious choice of operands, Boggs’ complex clipping instruction can be reduced to a user- level rounding instruction (Ans. 9–11). Moreover, the Examiner finds that Boggs directly discloses a prior art user-level rounding instruction having an immediate value that identifies one of a plurality of rounding modes (Ans. 12). Appellants argue that Boggs teaches away from using this user-level rounding instruction by teaching its combination with other prior art, user- level instructions in the formation of the complex clipping instruction (App. Br. 13, 14). But the simple fact that Boggs’ invention lies elsewhere does not teach away from using the disclosed prior art user-level rounding Appeal 2012-003411 Application 11/525,420 7 instruction. “The use of patents as references is not limited to what the patentees describe as their inventions or to the problems with which they are concerned. They are part of the literature of the art, relevant for all they contain.” In re Heck, 669 F.2d 1331, 1332–33 (Fed. Cir. 1983). Next, Appellants argue that the combination of Boggs, Smith and Tanenbaum fails to teach or suggest a rounding instruction whose immediate value includes separate fields for an override indicator and a rounding mode identifier (App. Br. 11–13). We are not persuaded by Appellants’ argument. The Examiner finds, and we agree, that Smith discloses these limitations to a person of ordinary skill in the art (Ans. 14). In particular, the Examiner finds that Smith’s LOAD FP INTEGER instruction discloses an immediate value that includes an M3 field that encodes both an override indicator and a rounding mode identifier, and that it would have been within the level of skill in the art at the time of the invention to encode Smith’s override indicator and rounding mode identifier in different fields of the immediate value rather in the same M3 field (Id. at 14–17). Smith discloses a computer system whose default floating point rounding mode may be overridden by a rounding mode designated by an instruction (Smith, Abs.). Smith also discloses a LOAD FP INTEGER instruction that includes an immediate value having an M3 field that controls how floating point numbers are rounded (Id. at 3:44–46). When all three bits of the M3 field are zero, floating point numbers are rounded according to a default rounding mode stored in a status register (Id. at 3:57, 58). However, when one or more bits of the M3 field are non-zero, floating point numbers are rounded according to the rounding mode identified by the M3 field bits (Id. at 3:58–60). Appeal 2012-003411 Application 11/525,420 8 Consequently, we agree with the Examiner’s finding that Smith’s M3 field encodes both an override indicator and a rounding mode identifier. Moreover, we agree with the Examiner’s finding that a person of ordinary skill in the art at the time of Appellants’ invention would have known that Smith’s override indicator and rounding mode identifier could have been encoded in the same or different fields of the immediate value. As the Examiner explained, encoding the information in the same fields would conserve instruction bits, while encoding the information in different fields would simplify decoding logic (Ans. 17). Indeed, Hansen teaches that exact concept, albeit in terms of exception handling indicators and rounding mode identifiers, namely, that exception handling indicators and rounding mode identifiers can be encoded together using 3 bits rather than separately using 7 bits in order to conserve operation code space (See Ans. 32–34; Hansen, 4:16–40). In view of the foregoing, we agree with the Examiner’s finding that the combination of Boggs, Smith and Tanenbaum teaches “receiving a user- level rounding instruction of an instruction set architecture and an immediate value” and making a “determination . . . whether a rounding mode indicator of [the] immediate value is active, and if so executing the rounding operation according to a rounding mode field of the immediate value” as required by claim 1 (App. Br. 11–13). Accordingly, we affirm the Examiner’s rejection of claim 1, and for the same reasons the Examiner’s rejections of claims 2–5, 7, 8, 10, 11 and 14–16.5 5 Appellants do not separately argue for the patentability of claims 2–5, 7, 8, 10, 11 and 14–16. We therefore consider the patentability of these claims based on the patentability of claim 1. (37 C.F.R. § 41.37(c)(1)(iv)) Appeal 2012-003411 Application 11/525,420 9 D. Whether Boggs, Smith and Tanenbaum, in combination, teach adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold. Appellants proffer three arguments for the patentability of claim 25 over the combination of Boggs, Smith and Tanenbaum. Appellants first argue that the combination fails to disclose a user-level round instruction having an override indicator in an immediate value (App. Br. 14). We discussed this contention above, in reference to claim 1, and are not persuaded by Appellants argument for the reasons noted supra. Appellants next argue that claim 25 is patentable over the combination of Boggs, Smith and Tanenbaum, because the combination fails to teach or suggest adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold (App. Br. 14). We note that the Examiner did not find that the Boggs, Smith, and Tanenbaum combination disclosed this limitation. Instead, the Examiner took Official Notice that the round-half up procedure was well known to persons of skill in the art at the time of Appellants’ invention, and disclosed the limitation (Ans. 20, 22). The Examiner described the round-half-up procedure as rounding positive numbers (i.e., numbers greater than a threshold of zero) by adding +0.5 to them and truncating, and rounding negative numbers (i.e., numbers less than the threshold of zero) by adding -0.5 to them and truncating (Id.). We agree with the Examiner’s finding. The Examiner is entitled to take Official Notice of “facts beyond the record which, while not generally notorious, are capable of such instant and unquestionable demonstration as to defy dispute.” In re Ahlert, 424 F.2d 1088, 1091 (CCPA 1970). Here, the Examiner has not only identified the Appeal 2012-003411 Application 11/525,420 10 round-half-up procedure, but has provided an instant and unquestionable explanation of it that defies dispute. Moreover, Appellants have neither traversed the Examiner’s identification of round-half-up as a well-known prior art rounding procedure, nor disputed the Examiner’s explanation of it. Consequently, we adopt and affirm the Examiner’s finding that the round- half-up procedure was well known to persons of skill in the art at the time of Appellant’s invention, and teaches adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold. See In re Chevenard, 139 F.2d 711, 713 (CCPA 1943). Appellants third and final argument for the patentability of claim 25 over the combination of Boggs, Smith, and Tanenbaum is the combination fails to teach or suggest an instruction set architecture (ISA) having multiple round instructions to round operands having different data types. To advance this argument, Appellants have traversed the Examiner’s Official Notice that ISA’s having separate instructions for single and double precision data types were well known to persons of skill in the art at the time of Appellants’ invention on the grounds that the Official Notice was raised for the first time on Final Rejection and failed to instantly and unquestionably demonstrate that such instructions were well known (App. Br. 14, 15). To successfully traverse an Officially Noticed finding of fact, Appellants must do more than simply object to the timing of the Official Notice or restate the test under which it is proper for the Examiner to take Official Notice. In particular, Appellants must “specifically point out the supposed errors in the examiner’s action, which would include stating why the noticed fact is not considered to be common knowledge or well-known Appeal 2012-003411 Application 11/525,420 11 in the art.” MPEP § 2144.03(c); see also, Chevenard at 713. Appellants have failed to do so here. As to the timing, although it is true that the Examiner first took Official Notice in the Final Office Action, it is also true that Appellants had adequate opportunity to point out any supposed errors in the Examiner’s action or why the noticed fact was not common knowledge in their Appeal Brief. As the Examiner correctly noted: Applicants could have provided a technical reference which called into question the examiner’s Official Notice, and the examiner would have supplied one or more references supporting it. Applicants could also have stated on the record they were unaware of any prior art supporting the examiner’s Official Notice, and the examiner would have supplied one or more references supporting it. (Ans. 23, 24). Because Appellants have failed to meet their burden to traverse the Examiner’s finding that ISA’s having different instructions for different data types were well known to persons of skill in the art at the time of Appellants invention, we affirm, adopt the Examiner’s finding as our own, and enter the fact into evidence. In view of the foregoing, we find that the combination of Boggs, Smith and Tanenbaum teaches adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold, and that the rounding instruction is one of multiple rounding instructions in the instruction set of an instruction set architecture, where each rounding instruction performs round operations on operands having different data element types as required by claim 25. Thus, we affirm the Examiner’s Appeal 2012-003411 Application 11/525,420 12 rejection of claim 25, and for the same reasons the Examiner’s rejections of claims 26, 28–31, 37 and 38.6 E. Whether Boggs, Smith and Hansen, in combination, teach a rounding instruction having an immediate value that includes a precision exception indicator field. As a preliminary matter, Appellants argue that the rejection of claim 6 was improper because it was not based upon Tanenbaum, which was used to reject claim 1 from which claim 6 depends (App. Br. 15). The Examiner finds that since Tanenbaum was not relied upon to reject a specific limitation of claim 1, but merely to establish knowledge common to a person of ordinary skill in the art at the time of Appellants invention, it was not needed to reject claim 1 and is therefore not needed to reject claim 6 (Ans. 29–30). At the outset, we treat the Examiner’s omission of Tanenbaum in the rejection of dependent claim 6 as inadvertent error, since it is necessarily incorporated by reference given the dependence of claim 6 from claim 1. Moreover, in rejecting claim 1, the Examiner found that Boggs directly disclosed a prior art, user-level, rounding instruction as well as a complex clipping instruction that included the rounding instruction (Ans. 9, 12; see, also Boggs, ¶¶ 29, 30). Since the Examiner cited Tanenbaum simply to support his proposition that a person of skill in the art at the time of Appellants invention would have known that Boggs’ rounding instruction could have been used as a stand-alone instruction or incorporated into the more complex clipping instruction, and since Boggs is prior art for all it 6 Appellants do not separately argue for the patentability of claims 26, 28– 31, 37 and 38. We therefore consider the patentability of these claims based on the patentability of claim 25. (37 C.F.R. § 41.37(c)(1)(iv)) Appeal 2012-003411 Application 11/525,420 13 discloses, In re Heck, 669 F.2d at 1332–33, we find that Tanenbaum was at best cumulative evidence used in the rejection of claim 1, and its omission in the rejection of claim 6 was harmless error. Appellants next argue that the combination of Boggs, Smith and Hansen fails to teach or suggest a rounding instruction with an immediate value that includes a precision exception indicator (App. Br. 15). As disclosed in Appellants’ Specification, a precision suppression indicator (claim 6) or precision override indicator (Figure 3) is a bit that “may be set to indicate allowance of inexact results such that no precision exception, even if occurring during operation of the associated instruction, will cause setting of an exception flag within a status register” (Spec. ¶ 23, Fig. 3). In other words, a precision exception indicator is a flag that can be set in a field of the immediate value of an instruction that indicates whether an exception flag should be set in a status register when the result of the instruction is inexact. The Examiner finds, and we agree, that Hansen teaches a floating point instruction having an immediate value field that includes an inexact / precision exception indicator (Ans. 25). Hansen discloses a method for “encoding floating point information within processor instructions” (Hansen, 1:6–9). ”The floating point information indicates whether an exception trap should occur and the type of rounding to be performed upon ‘inexact’ arithmetic results” (Hansen, Abs.). Hansen discloses that “[t]here are generally five different exception types which may occur in processors of prior art systems,” including an ‘X’ or inexact exception type indicating an inexact result that needs to be rounded (Id. at 1:41–58). Hansen discloses an embodiment of his invention that incorporates three bits of control information in a floating point instruction Appeal 2012-003411 Application 11/525,420 14 to allow the selection of an arbitrary rounding mode “with all exception traps excluding inexact (X) enabled,” and the selection of no rounding mode with “all exception traps, including inexact (X) enabled” (Id. at 4:34–40) (emphasis added). Hanson also discloses a simpler embodiment that uses “five bits of control for each exception type (V, Z, U, O, and X), and two bits to select rounding (N, T, C, F)” (Id. at 4:16–20). In other words, Hansen discloses using a single bit in an immediate value of a floating point instruction to indicate whether an inexact exception flag ‘X’ should or should not be set or enabled. Accordingly, we affirm the Examiner’s rejections of claims 6 and 12.7 F. Whether Boggs, Smith and Hansen, in combination, teach a status register that stores a default round mode and status information indicating a precision exception. Appellants first argue that claim 18 is patentable because the combination of Boggs, Smith and Hansen fails to disclose a user-level round instruction having an immediate value with separate fields for an override indicator and round mode identifier, where the round mode identifier encodes multiple round modes (App. Br. 16). We addressed this argument above, in reference to claim 1, and found Appellants argument unpersuasive for the reasons noted supra. Appellants next argue that claim 18 is patentable because the Boggs, Smith and Hansen combination fails to disclose a user-level round instruction that includes an immediate value or control field that includes a 7 Appellants do not separately argue for the patentability of claim 12. We therefore consider the patentability of claim 12 based on claim 6. (37 C.F.R. § 41.37(c)(1)(iv)) Appeal 2012-003411 Application 11/525,420 15 precision exception indicator (App. Br. 16). We likewise addressed this argument above, in reference to claim 6, and found Appellants argument unpersuasive for the reasons noted there. Finally, Appellants argue that claim 18 is patentable because the Boggs, Smith and Hansen combination fails to disclose a register that stores a default round mode and status information indicating a precision exception (App. Br. 16). The Examiner finds, and we agree, that both Smith and Hansen disclose these limitations (Ans. 31). As noted above, Hansen discloses a system and method for encoding floating point information within processor instructions (Hansen, 1:6–9). Hansen discloses that CPUs generally use status registers to store mode bits and status information, including bits indicating whether certain interrupt flags have been set by the processor (Id. at 1:13–18). Hansen further discloses that CPUs can set inexact or precision exception flags in their status registers to alert users to the fact that inexact results have been or need to be rounded (Id. at 1:30–39). Hansen’s floating point instruction includes rounding mode bits 3–5, and type bits 26 and 27 (Hansen, Fig. 5). When type bit 27 is null or zero, the CPU sets exception flags and performs rounding according to a default rounding mode (Id. at 8:63–65). By contrast, when type bits 26 and 27 are set, the CPU sets exception flags and performs rounding according to the rounding and exception modes encoded in bits 3–5 (Id. at 8:65–68). As shown in Tables 8 and 9, when bits 3–5 take on values between 0 (000) and 4 (100), inclusive, Hansen does not set the inexact exception flag (X=0). By contrast, when bits 3–5 take on the value of 5 (101), Hansen does set the inexact exception flag (X=1) (Id. at 9:1–45). Appeal 2012-003411 Application 11/525,420 16 Similarly, Smith discloses: A computer system having a default floating point rounding mode that may be overridden by a rounding mode designated by an instruction. The current machine rounding mode is stored in a register, and an instruction includes a field for specifying whether rounding should be performed according to the current rounding mode or according to another rounding mode during execution thereof. (Smith, Abs.) Figure 4 of Smith illustrates a “floating-point-control (FPC) register 210 . . . [that] contains the mode (i.e., rounding mode), mask, flag and code bits” (Id. 2:54–57). As the Examiner correctly found, bits 6 and 7 in byte 3 of FPC register 210 stores a default round mode, while bit 4 in byte 1 of FPC register 210 stores a status flag indicating whether a precision or inexact exception has occurred (Id., Fig. 4). In view of the foregoing, we find that the combination of Boggs, Smith and Hansen teaches a system that receives and executes a user-level round instruction having an immediate value with separate fields for an override indicator and round mode identifier, where the round mode identifier encodes multiple round modes, and where the system includes a status register that stores a default round mode and status information indicative of a precision exception as required by claim 18. Thus, we affirm the Examiner’s rejection of claim 18, and for the same reasons the Examiner’s rejections of claims 20, 22, and 24.8 8 Appellants do not separately argue for the patentability of claims 18, 20, 22 and 24. We therefore consider the patentability of the claims based on the patentability of claim 18. (37 C.F.R. § 41.37(c)(1)(iv)) Appeal 2012-003411 Application 11/525,420 17 CONCLUSIONS The Examiner erred in finding that: A. Appellants failed to provide sufficient written description in the Specification to support the claims; and B. Appellants failed to enable the inventions recited in the claims to a person of ordinary skill in the art. The Examiner did not err in finding that: C. Boggs, Smith and Tanenbaum, in combination, teach a user-level rounding instruction having an immediate value that includes separate rounding mode indicator and rounding mode fields as required by claim 1; D. Boggs, Smith and Tanenbaum, in combination, teach adding different values to the operand of a rounding instruction based on the operand’s relation to a threshold as required by claim 25; E. Boggs, Smith and Hansen, in combination, teach a rounding instruction having an immediate value that includes a precision exception indicator field as required by claim 6; and F. Boggs, Smith and Hansen, in combination, teach a status register that stores a default round mode and status information indicating a precision exception. DECISION The Examiner’s decision rejecting claims 1–8, 10–12, 14–16, 18, 20, 22, 24–26, 28–31, 37 and 38 under 35 U.S.C. § 112 ¶ 1 is reversed. The Examiner’s decision rejecting claims 1–8, 10–12, 14–16, 18, 20, 22, 24–26, 28–31, 37, and 38 under 35 U.S.C. § 103(a) is affirmed. Appeal 2012-003411 Application 11/525,420 18 No time period for taking any subsequent action in connection with this appeal may be extended under 37 C.F.R. § 1.136(a)(1)(iv) (2009). AFFIRMED kme Copy with citationCopy as parenthetical citation