37 C.F.R. § 1.317 Lapsed patents; delayed payment of balance of issue fee.
Title 37 - Patents, Trademarks, and Copyrights
If the issue fee paid is the amount specified in the notice of allowance, but a higher amount is required at the time the issue fee is paid, any remaining balance of the issue fee is to be paid within three months from the date of notice thereof and, if not paid, the patent will lapse at the termination of the three-month period. [62 FR 53198, Oct. 10, 1997]
Title 37: Patents, Trademarks, and Copyrights
PART 1—RULES OF PRACTICE IN PATENT CASES
Subpart B—National Processing Provisions
Allowance and Issue of Patent
§ 1.317 Lapsed patents; delayed payment of balance of issue fee.
