Ranges : CAFC Alert

Can an open-ended claim range be enabled?

Bill Schertler | August 22, 2012

Magsil Corp. and MIT v. Hitachi Global

August 14, 2012

Panel:  Rader, O’Malley, Reyna.  Opinion by Rader.

Summary

The U.S. District Court for the District of Delaware granted summary judgment finding claims 1-5, 23, 26 and 28 of appellants’ U.S. Patent No. 5,629,922 (the ‘922 patent) invalid as a matter of law for lack of enablement and therefore non-infringed.  At issue was whether the specification enabled the broad scope of the claimed “open-ended” range of values having a lower threshold, but no upper limit, defined by “a change in the resistance by at least 10% at room temperature”.

Magsil appealed the district court’s decision.  On appeal, the CAFC affirmed the district court’s finding that claims 1-5, 23, 26 and 28 of the ‘922 patent are invalid for lack of enablement.


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Another per se rule bites the dust. A reference that discloses a range encompassing a somewhat narrower claimed range may not be sufficient to establish a prima facie case of obviousness

Lee Wright | April 12, 2012

Genetics Institute, LLC v. Novartis Vaccines and Diagnostics, Inc.

August 23, 2011

Panel:  Lourie, Plager and Dyk.  Opinion by Lourie.  Concurrence-in-part and dissent-in part by Dyk.

Summary:

This article concludes a three-part series regarding this important case from last year.   For part 1, click here.  For part 2, click here.  This final article discusses the following questions:

Question 1:  Does a broad range necessarily render obvious a narrower range falling within that broader range?

Answer 1:  No.

Question 2:  Do all minor chemical differences always lead to a conclusion of obviousness?

Answer 2:  No.


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