MPEP Section 706.03(k), Duplicate Claims

Executive summary:

This document contains Section 706.03(k) ("Duplicate Claims") of the Manual of Patent Examining Procedure (the "M.P.E.P."), Eighth Edition, Eighth Revision (July 2010). This page was last updated in January 2011. You may return to the section index to find a particular section. Alternatively, you may search the MPEP using the search box that appears on the left side of every page of BitLaw--you may restrict your search to the MPEP on the search results page.

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706.03(k) Duplicate Claims

Inasmuch as a patent is supposed to be limited to only one invention or, at most, several closely related indivisible inventions, limiting an application to a single claim, or a single claim to each of the related inventions might appear to be logical as well as convenient. However, court decisions have confirmed applicant's right to restate (i.e., by plural claiming) the invention in a reasonable number of ways. Indeed, a mere difference in scope between claims has been held to be enough.

Nevertheless, when two claims in an application are duplicates, or else are so close in content that they both cover the same thing, despite a slight difference in wording, it is proper after allowing one claim to object to the other claim under 37 CFR 1.75 as being a substantial duplicate of the allowed claim.

Form paragraphs 7.05.05 and 7.05.06 may be used where duplicate claims are present in an application.

¶ 7.05.05 Duplicate Claims, Warning

Applicant is advised that should claim [1] be found allowable, claim [2] will be objected to under 37 CFR 1.75 as being a substantial duplicate thereof. When two claims in an application are duplicates or else are so close in content that they both cover the same thing, despite a slight difference in wording, it is proper after allowing one claim to object to the other as being a substantial duplicate of the allowed claim. See MPEP § 706.03(k).

Examiner Note

1. Use this form paragraph whenever two claims are found to be substantial duplicates, but they are not allowable. This will give the applicant an opportunity to correct the problem and avoid a later objection.

2. If the claims are allowable, use form paragraph 7.05.06.

¶ 7.05.06 Duplicate Claims, Objection

Claim [1] objected under 37 CFR 1.75 as being a substantial duplicate of claim [2]. When two claims in an application are duplicates or else are so close in content that they both cover the same thing, despite a slight difference in wording, it is proper after allowing one claim to object to the other as being a substantial duplicate of the allowed claim. See MPEP § 706.03(k).

Examiner Note

If the duplicate claims are not allowable, use form paragraph 7.05.05.

See MPEP § 804 for double patenting rejections of inventions not patentable over each other.