Ohio Rev. Code Ann. § 1309.315
(A) Except as otherwise provided in this chapter and in division (B) of section 1302.44 of the Revised Code:
(B) Proceeds that are commingled with other property are identifiable proceeds:
(D) A perfected security interest in proceeds becomes unperfected on the twenty-first day after the security interest attaches to the proceeds unless:
(1) The following conditions are satisfied:
(E) If a filed financing statement covers the original collateral, a security interest in proceeds that remains perfected under division (D)(1) of this section becomes unperfected at the later of: