Jepson Claim Preamble Requires Written Description Support for Conventional Aspects of the Invention
Summary: To provide adequate written description for a Jepson claim, the applicant must establish that what is claimed to be well known in the prior art is, in fact, well known in the prior art.
The Federal Circuit says that you must disclose and describe the prior art, or your Jepson claim is invalid. Obviously, this ...
In re: Xencor, Inc., Appeal No. 2024-1870 (Fed. Cir. Mar. 13, 2025) ...
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