News & Analysis as of

Prior Art CAFC Claim Construction

MoFo Life Sciences

Is Your Claim Open or Closed? Claim Construction Takes on a New Meaning in Eye Therapies, LLC v. Slayback Pharma, LLC

MoFo Life Sciences on

On June 30, 2025, the Federal Circuit issued a precedential decision in Eye Therapies, LLC v. Slayback Pharma, LLC, reversing the Patent Trial and Appeal Board’s (PTAB’s) claim construction of the phrase “consisting...more

McDonnell Boehnen Hulbert & Berghoff LLP

Eye Therapies LLC v. Slayback Pharma, LLC (Fed. Cir. 2025)

Patent law in many respects has its own language and idiosyncratic expressions, and one such respect involves so-called "transitional" words or phrases (discussed in greater depth in the Manual of Patent Examination Procedure...more

MoFo Life Sciences

A Tip for Improving Your “Improved” Jepson Claim: Include Written Description Support

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The Federal Circuit issued a precedential opinion in In re: Xencor, Inc.concerning written support for Jepson claims. The decision affirms the decision of the Appeals Review Panel (ARP) of the USPTO, which held that the...more

WilmerHale

Federal Circuit Patent Watch: An Enabling Anticipatory Prior Art Reference Need Only Enable a Single Embodiment of the Claim

WilmerHale on

Precedential and Key Federal Circuit Opinions - ALNYLAM PHARMACEUTICALS, INC. v. MODERNA, INC. [OPINION] (2023-2357, 06/04/2025) (Taranto, Chen, Hughes) - Taranto, J. The Court affirmed the district court’s claim...more

Irwin IP LLP

Seeing Double?  Similar Claim Terms Could Be Trouble  

Irwin IP LLP on

When prosecuting a patent with similar language across various claims make sure your claim terms have different meanings, otherwise, during litigation you may lose the strategic opportunity to keep some claims valid if others...more

Jones Day

Federal Circuit: Plans for Future Activity Created a Substantial Risk of Future Infringement

Jones Day on

Restem filed a petition for inter partes review of U.S. Patent No. 9,803,176, directed to stem cells obtained from umbilical cord tissue and isolated through a two-step process to create a specific cell marker expression...more

DLA Piper

What is a “Clear and Unmistakable” Prosecution History Disclaimer?

DLA Piper on

The Federal Circuit’s March 21, 2025 decision in Maquet Cardiovascular LLC v. Abiomed Inc. et al. (No. 2023-2045) and the recent Patent Trial and Appeal Board (PTAB) Delegated Rehearing Panel decision in SynAffix B.V. v....more

McDermott Will & Emery

X-Ray Vision: Court Sees Through Implicit Claim Construction

The US Court of Appeals for the Federal Circuit reversed the Patent Trial & Appeal Board’s final determination that challenged patent claims were not unpatentable, finding that the Board’s decision relied on an erroneous...more

A&O Shearman

Federal Circuit Rejects PTAB’s Implicit And Incorrect Claim Construction Of “Between 1 And 10”

A&O Shearman on

On May 23, 2025, the United States Court of Appeals for the Federal Circuit (“CAFC”) issued a precedential opinion reversing a final written decision from the U.S. Patent Trial and Appeal Board (“PTAB”) finding the challenged...more

Sheppard Mullin Richter & Hampton LLP

Undetectable Amount of Magnification IS Magnification

This Federal Circuit Opinion analyzes invalidity based on anticipation and obviousness, more specifically based on implicit claim construction of the claim limitation and inherent disclosures....more

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