Xencor Appeals Federal Circuit Ruling on Antibody Patent, Citing Burdensome Jepson Claim Requirements

In recent legal developments, Xencor has petitioned the full Federal Circuit for a review concerning the rejection of its antibody patent application. The crux of their argument pivots on the application’s use of the Jepson claim format, a patent claim structure often highlighting improvements over known technology. Xencor contends that the ruling imposed an “onerous requirement” rendering the format virtually unfeasible, thereby removing any motivation to deploy this method in patent filings. For further details on this case, refer to the full report.