Reissue patent : CAFC Alert

Claimed inventions of a reissue patent must be clearly and unequivocally disclosed in the original specification

| December 17, 2014

Antares Pharma, Inc. v. Medac Pharma Inc., et al.

November 17, 2014

Panel: Dyk, Reyna, and Taranto.  Opinion by Dyk.


The Federal Circuit found the asserted reissue claims invalid for failure to comply with the “original patent” requirement of 35 U.S.C. § 251.  Under § 251, the original patent specification must adequately disclose the later-claimed features.  Here, the Federal Circuit found that the original specification failed to clearly and unequivocally disclose the inventions of the asserted claims of the reissue patent.


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