United States Code · Section

§ 151 — Issue Of Patent

35 U.S.C. § 151

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(a) If it appears that an applicant is entitled to a patent under the law, a written notice of allowance of the application shall be given or mailed to the applicant. The notice shall specify a sum, constituting the issue fee and any required publication fee, which shall be paid within 3 months thereafter. (b) Upon payment of this sum the patent may issue, but if payment is not timely made, the application shall be regarded as abandoned.

35 U.S.C. § 152

Implementing Regulations

§ 1.41-4 Qualified research for expenditures paid or incurred in taxable years ending on or after December 31, 2003.
26 C.F.R. § 1.41-4
§ 1.103 Suspension of action by the Office.
37 C.F.R. § 1.103
§ 1.704 Reduction of period of adjustment of patent term.
37 C.F.R. § 1.704
§ 1.702 Grounds for adjustment of patent term due to examination delay under the Patent Term Guarantee Act of 1999 (original applications, other than designs, filed on or after May 29, 2000).
37 C.F.R. § 1.702
§ 1.703 Period of adjustment of patent term due to examination delay.
37 C.F.R. § 1.703
§ 1.701 Extension of patent term due to examination delay under the Uruguay Round Agreements Act (original applications, other than designs, filed on or after June 8, 1995, and before May 29, 2000).
37 C.F.R. § 1.701