How has the view on negative limitations in patent claims evolved over time?

The view on negative limitations in patent claims has evolved significantly over time, becoming more accepting. The MPEP 2173.05(i) provides insight into this evolution: “The current view of the courts is that there is nothing inherently ambiguous or uncertain about a negative limitation. […] Some older cases were critical of negative limitations because they tended…

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How should patent examiners evaluate claims that might have previously been rejected under the Old Combination principle?

Patent examiners should evaluate claims based on their compliance with current statutory requirements, particularly 35 U.S.C. 112(b), rather than using the Old Combination principle. The MPEP 2173.05(j) states: “Claims should be considered proper so long as they comply with the provisions of 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph.” This means examiners…

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How do examiners determine if claim language is indefinite?

How do examiners determine if claim language is indefinite? Examiners assess claim language for indefiniteness based on the guidance provided in MPEP 2173.01. The key principle is stated as follows: “A claim is indefinite when it contains words or phrases whose meaning is unclear.“ To determine if claim language is indefinite, examiners consider: Whether the…

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What is the current basis for evaluating patent claims that might have previously fallen under the Old Combination principle?

The current basis for evaluating patent claims that might have previously fallen under the Old Combination principle is their compliance with statutory requirements, particularly 35 U.S.C. 112(b). The MPEP 2173.05(j) states: “Claims should be considered proper so long as they comply with the provisions of 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph.”…

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What are the potential consequences of including “use” claims in a U.S. patent application?

Including “use” claims in a U.S. patent application can have several potential consequences: Rejection under 35 U.S.C. 112(b): “Use” claims are often considered indefinite and may be rejected. Delays in prosecution: Addressing rejections can prolong the patent examination process. Increased costs: Revising claims and responding to office actions can lead to additional attorney fees. Narrower…

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