When can referencing limitations from another claim lead to rejection?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-29 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. While referencing limitations from another claim is generally acceptable, there are situations where it can lead to rejection. According to MPEP 2173.05(f) : “However, where the format of making reference to limitations recited in another claim results in confusion, then a rejection would be proper under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph.” This means that if the way a claim references another claim creates ambiguity or uncertainty about the claim’s scope, it may be rejected for indefiniteness. Patent drafters should ensure that references to other claims are clear and do not introduce confusion. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Claim Can Refer to Another Claim Limitation MPEP 2173.05(f) Recommended Reference to Another Claim is Acceptable Under Section 112(b) MPEP 2173.05(f) Claims Must Be Clear and Definite MPEP 2173 Claim Must Be Definite Under Section 112(b) MPEP 2173 Dependent Claim Must Comply with Section 112(d) MPEP 2173.05(f) Recommended Claims Must Particularly Point Out and Distinctly Claim the Invention MPEP 2173 Required Claims Must Particularly Point Out and Distinctly Claim the Invention MPEP 2173 Definiteness Requirement for Claims MPEP 2173 Required Requirement for Clear Claim Language MPEP 2173 Permitted Claims Must Clearly Define Boundaries MPEP 2173 Required Other Related FAQs 5 FAQs Collapse What are some examples of acceptable claim references? Can method claims reference limitations from apparatus claims? What should examiners consider when reviewing dependent claims? How does referencing limitations affect product-by-process claims? Is it acceptable to reference limitations from another claim?