Manual of Patent Examining Procedure - MPEP

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800 Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting

811 Time for Making Requirement

37 CFR 1.142(a), second sentence, indicates that a restriction requirement "will normally be made before any action upon the merits; however, it may be made at any time before final action ." This means the examiner should make a proper requirement as early as possible in the prosecution, in the first action if possible, otherwise, as soon as the need for a proper requirement develops.

Before making a restriction requirement after the first action on the merits, the examiner will consider whether there will be a serious burden if restriction is not required.

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