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Prior Art Jepson Claims

MoFo Life Sciences

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

MoFo Life Sciences on

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

Miller Canfield

Jepson Claims No Substitute for Written Description in Patents

Miller Canfield on

Federal Circuit Holds That the Preamble of Jepson-Style Claims Must Be Supported by an Adequate Written Description - U.S. patent claims have a preamble, and, in most cases, the preamble is not limiting. Jepson-style...more

Goodwin

The Court of Appeals for the Federal Circuit’s In Re Xencor Decision: Jepson Claims Require Written Description for Their...

Goodwin on

On March 13, 2025, the US Court of Appeals for the Federal Circuit (Federal Circuit) issued a decision titled In Re: Xencor, Inc. (the Xencor decision). The Xencor decision affirms the decision of the Appeals Review Panel...more

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