A judgment in an action of ejectment shall be conclusive as to the right of possession established upon the party against whom it is recovered, and upon all persons claiming from, through, or under such party, by title arising after the commencement of the action; but if any person against whom such judgment is recovered shall be, at the time of its recovery, an infant or person of unsound mind, the judgment shall not be a bar to an action commenced by such person, or any one claiming by inheritance from, through, or under him, within three years after the removal of his disability.