What is the standard for determining indefiniteness in patent claims?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-30 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. The standard for determining indefiniteness in patent claims is whether those skilled in the art would understand what is claimed when the claim is read in light of the specification. As stated in the MPEP: “A decision on whether a claim is indefinite under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph requires a determination of whether those skilled in the art would understand what is claimed when the claim is read in light of the specification.” This standard is based on the perspective of a person of ordinary skill in the relevant art, considering the claim language, specification, and prosecution history. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Claim Interpretation Must Be Stated in Reasons for Allowance MPEP 2173.02 Recommended Relevant Time for Pre-AIA 35 U.S.C. 102 MPEP 2173.02 Claim Must Apprise One of Ordinary Skill in Art MPEP 2173.02 Required Patented Claim Language Must Be Clear MPEP 2173.02 Claim Terms Must Be Understandable to Skilled Artisans MPEP 2173.02 Claim Language Must Be Clear and Definite MPEP 2173.02 Claim Language Indefiniteness Not Per Se Rule MPEP 2173.02 Recommended Claim Language Must Be Clear and Precise MPEP 2173.02 Claim Language Must Be Clear to Examiner MPEP 2173.02 Permitted Claim Language Must Be Clearly Defined MPEP 2173.02 Other Related FAQs 5 FAQs Collapse What is the &#8220;broadest reasonable interpretation&#8221; standard in claim indefiniteness? What is the difference between claim breadth and indefiniteness? How should examiners establish a clear record when rejecting claims for indefiniteness? How does the USPTO handle indefiniteness rejections for computer-implemented functional claim limitatio...