Ohio Revised Code Title LIII. Real Property § 5301.51

(A) Any person claiming an interest in land may preserve and keep effective the interest by filing for record during the forty-year period immediately following the effective date of the root of title of the person whose record title would otherwise be marketable, a notice in compliance with section 5301.52 of the Revised Code.  No disability or lack of knowledge of any kind on the part of anyone suspends the running of the forty-year period.  The notice may be filed for record by the claimant or by any other person acting on behalf of any claimant who is:

(B) If the same record owner of any possessory interest in land has been in possession of the land continuously for a period of forty years or more, during which period no title transaction with respect to such interest appears of record in his chain of title, and no notice has been filed by him on his behalf as provided in division (A) of this section, and such possession continues to the time when marketability is being determined, the period of possession is equivalent to the filing of the notice immediately preceding the termination of the forty-year period described in division (A) of this section.