Okla. Stat. tit. 12A § 2-720
Unless the contrary intention clearly appears, expressions of "cancellation" or "rescission" of the contract or the like shall not be construed as a renunciation or discharge of any claim in damages for an antecedent breach.
Okla. Stat. tit. 12A, § 2-720
Oklahoma Code Comment
Previous Oklahoma law is in accord. In Coyle v. Baum, 3 Okl. 695, 41 P. 389 (1895) the buyer purchased oats to feed his horses. It contained a poisonous substance, and several of his animals died. When the buyer discovered the presence of the injurious substance in the oats, he returned it to the seller and a pro rata portion of his purchase price was returned. The court held that this was not such a rescission as to bar him from recovery of damages. It was, at the most, a rescission of the unused portion, but not of the used portion which had caused the damage.