Okla. Stat. tit. 78, § 78-25: Duration and renewal

A. Registration of a trademark pursuant to the provisions of

this title shall be effective for an initial term of ten (10) years

from the date of registration and, upon application filed within six

(6) months prior to the expiration of such term, on a form to be

furnished by the Secretary of State, the registration may be renewed

for successive periods of five (5) years. A renewal fee of Twenty-

five Dollars ($25.00), payable to the Secretary of State, shall

accompany the application for renewal of the registration.

B. A trademark registration may be renewed for successive

periods of five (5) years in the same manner as the initial renewal.