Restriction, Election, and the Cost of a Traverse
An examiner issues a restriction requirement in a application with claims to (1) a machine for extruding pasta and (2) a method of cleaning the machine using a particular solvent. The examiner asserts the claims are directed to distinct inventions, that the machine and method are not connected by a special technical feature, and that the search burden is separate. The applicant believes the cleaning method is inherent to the machine's operation and that the solvent was designed specifically for the machine's brass die. The applicant has a 2-month shortened statutory period, no extensions taken yet, and a budget that permits one response. The examiner's action also includes a rejection of the machine claims under 103 over two references. The applicant asks whether to traverse the restriction, how to respond to the rejection, and what happens if the traverse fails.
1. Should the applicant traverse the restriction requirement, and what must a proper traverse contain?
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A traverse must be timely (within the shortened statutory period, here 2 months, extendable under 37 C.F.R. 1.136) and must specifically point out the errors in the requirement, with reasons (MPEP 818.01). A bare assertion that the inventions are linked is insufficient.
Here, the strongest argument is that the machine and method share a special technical feature - the brass die and solvent combination - such that they are not distinct under 35 U.S.C. 121. However, the examiner's separate-search-burden rationale is often upheld where the method can be practiced on other machines. A traverse does not stay the 103 rejection; applicant must also respond to the merits or risk abandonment. Strategy: traverse the restriction and argue the 103 rejection in the same response, since budget permits only one filing. If the traverse fails, applicant may petition the Director under 37 C.F.R. 1.144, but petition does not stay the period for reply.
2. If the applicant elects the machine claims without traverse and the method claims are later pursued in a divisional, what risk arises from the restriction requirement?
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Under 35 U.S.C. 121, a divisional filed in response to a restriction requirement is immune from a double-patenting rejection over the parent if the divisional is limited to the non-elected invention and the restriction was made with the requisite findings. The safe harbor protects against both obviousness-type and statutory double patenting.
But the safe harbor is fragile: if the applicant traverses and loses, or if the divisional claims are not consonant with the restriction, the immunity can be lost (MPEP 804.01). Also, the divisional must be filed while the parent is pending (or during pendency of an appeal) to claim benefit. If the applicant elects without traverse, the record should clearly show the election was made in response to the requirement. Recommend documenting the election and confirming the divisional claims map to the non-elected group.
3. How should the applicant handle the 103 rejection given the one-response budget?
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The response must address the rejection on the merits regardless of the restriction strategy. Options: (a) argue the references do not teach the claimed brass-die/solvent combination; (b) amend the machine claims to recite the die material and solvent compatibility, but only if the specification supports it (no new matter, 132(a)); (c) file a terminal disclaimer if the real issue is obviousness-type double patenting - not applicable to a 103 rejection.
Because the restriction traverse and the merits response go in one paper, the applicant should avoid amendments that would require a new search and complicate the restriction issue. If the examiner maintains the rejection, the applicant can appeal (37 C.F.R. 41.31) or file a request for continued examination. Given the budget, the best path is a focused argument plus a narrow amendment supported by the specification, preserving appeal rights.