Any record of a mineral deed actually made in the office of the recorder of any county of this state prior to March 7, 1941, is declared to be valid and fully operative as constructive notice though it was not certified for transfer by the county auditor as provided by section 11-13-12, and though at the time such deed was filed for record and actually recorded there may have been delinquent taxes or special assessments on the land described in such deed.