64 Pa. Stat. § 31
All and every the person and persons who are or shall be entitled, either in law or equity, to any lands in this state, within the limits of the Indian purchase, by virtue of any grant, warrant or location, before the tenth day of December, 1776, upon which patents have not issued, shall and may, upon payment to the Receiver-General of the Land-Office, hereby established, of the purchase money, and interest thereon, or the arrearages of such purchase money and interest agreed on for the said lands, together with the office fees; or if no purchase money or interest is or remains due therefor, then upon payment of the office fees, be entitled to receive a patent or patents for the same, as is hereafter directed, any former law, custom or usage to the contrary hereof in any wise notwithstanding. And in all cases where surveys have not yet been made or returned to the former Land-office, on any grant, warrant or location, issued before the said tenth day of December, in the year aforesaid, the owner or owners thereof, upon applying to the Land-office, at any time within the space of one year from the passing of this act, and paying down the one-third of the purchase money and interest then due on the same, shall be entitled to receive an order, directed to the Surveyor-General, to have the same surveyed and returned; and after such survey and return, on payment of the residue of the purchase money and interest, in manner aforesaid, he or they shall be entitled to receive a patent and confirmation of the same, in like manner.
64 P.S. § 31