37 CFR 1.499 Unity of invention during the national stage
475, the examiner may in an Office action require the applicant in the response to that action to elect the invention to which the claims shall be restricted. Such requirement may be made before any action on the merits but may be made at any time before the final action at the discretion of the examiner. Review of any such requirement is provided under §§ 1.143 and 1.144.
Examiners are reminded that unity of invention (not restriction practice pursuant to 37 CFR 1.141 – 1.146) is applicable in international applications (both Chapter I and II) and in national stage applications submitted under 35 U.S.C. 371. Restriction practice in accordance with 37 CFR 1.141-1.146 continues to apply to U.S. national applications filed under 35 U.S.C. 111(a), even if the application filed under 35 U.S.C. 111(a) claims benefit under 35 U.S.C. 120 and 365(c) to an earlier international application designating the United States or to an earlier U.S. Continue reading “If the examiner finds that a national stage application lacks unity of invention under § 1”