Okla. Stat. tit. 12A, § 12A-1-9-320: Buyer of goods

BUYER OF GOODS

(a) Except as otherwise provided in subsection (e) of this

section, a buyer in ordinary course of business, other than a person

buying farm products from a person engaged in farming operations,

takes free of a security interest created by the buyer’s seller,

even if the security interest is perfected and the buyer knows of

its existence.

(b) Except as otherwise provided in subsection (e) of this

section, a buyer of goods from a person who used or bought the goods

for use primarily for personal, family, or household purposes takes

free of a security interest, even if perfected, if the buyer buys:

(1) without knowledge of the security interest;

(2) for value;

(3) primarily for the buyer’s personal, family, or household

purposes; and

(4) before the filing of a financing statement covering the

goods.

(c) To the extent that it affects the priority of a security

interest over a buyer of goods under subsection (b) of this section,

the period of effectiveness of a filing made in the jurisdiction in

which the seller is located is governed by subsections (a) and (b)

of Section 1-9-316 of this title.

(d) A buyer in ordinary course of business buying oil, gas, or

other minerals at the wellhead or minehead or after extraction takes

free of an interest arising out of an encumbrance.

(e) Subsections (a) and (b) of this section do not affect a

security interest in goods in the possession of the secured party

under Section 1-9-313 of this title.