written description

§ 112 Enablement and Written Description in Post-Grant Review

When are written description and enablement requirements of 35 U.S.C. § 112 met, and what is a Petitioner’s burden of showing those requirements are not met in a PTAB proceeding? In Instrumentation Laboratory Co. v. Hemosonics… Read More

Written Description Inapplicable to Doctrine of Equivalents

The written description requirement does not extend to equivalents asserted under the doctrine of equivalents, according to a recent order in the District of Delaware. The district judge in Sprint v. Cox resolved dueling summary… Read More

PTAB: Patent Claims Not Supported Under 35 U.S.C. § 112, ¶1

Providing an example of claimed subject matter lacking written description in a patent specification, the Patent Trial and Appeal Board (PTAB) found selected claims of two patents invalid under 35 U.S.C § 112, ¶1, in parallel Co… Read More

Written Description Requirement Met by Original Claims

Claims included in an original patent application are part of the written description, which is why the Federal Circuit reversed a summary judgment that claims of U.S. Patent No. 6,947,882 were invalid for lack of written descript… Read More

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PTAB Practice: Recent Developments in Estoppel
November 21, 2019 at 12:00 pm EST
There are a wide range of estoppel issues that may be triggered under the America Invents Act (AIA) as a result of proceedings before the Patent Trial and Appeal Board (PTAB).  These estoppel issues complicate decision making in pursuing parallel pr…Register

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