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Can an open-ended claim range be enabled?
| 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.
Category: Case Summary, Claim Construction, Claim Issues, Enablement, Ranges, Specification Issues
Tags: criticality of ranges > enablement > open-ended claim range > ranges
Tags: criticality of ranges > enablement > open-ended claim range > ranges
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