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Continuations, Parents and Loss of Priority

The written description requirement is of heightened importance in determining the priority date for continuation patent applications. Without a sufficient written description that supports and details the claims of the patent, the priority date of the parent patent may be lost for the continuation application. This issue was recently addressed by the Federal Circuit in the Anascape, LTD. v. Nintendo of America, Inc., 601 F.3d 1333 (Fed. Cir. 2010) decision and the decision is useful to review to understand the consequences of failing to have sufficient support in the written description for claims in a continuation patent.

Click here for a more detailed discussion: Anascape, LTD. v. Nintendo of America, Inc.

The authors of are patent litigation lawyers at Jeffer Mangels Butler & Mitchell LLP. We represent inventors, patent owners and technology companies in patent licensing and litigation. Whether pursuing patent violations or defending infringement claims, we are aggressive and effective advocates for our clients. For more information contact Stan Gibson at 310.201.3548 or