Trivascular, Inc. v. Samuels, No. 15-1631 (Fed. Cir. 2016)
Annotate this CaseSamuel’s 575 patent, filed in 1997, claims inventions in the field of intraluminal stent technology. One type of intraluminal stent is a vascular stent. Vascular stents are used to treat medical conditions wherein a vascular wall is unduly constricted, as in the case of vascular stenosis, or unduly enlarged, as in the case of aneurysm. Either of these medical conditions poses an unacceptable risk of insufficient blood flow or vascular rupture. The 575 patent generally claims intraluminal stents that can be affixed to a vascular wall via the use of “an inflatable and deflatable cuff” without penetrating the vessel wall. In a 2013 infringement suit, defendant TriVascular filed a petition for inter partes review. The Patent Trial and Appeal Board found that TriVascular failed to demonstrate that the challenged claims were unpatentable over the applied art; adopted Samuels’ construction of “inflatable protrusions,” as “protrusions that are themselves inflatable, i.e., expandable by being filled with fluid;” and concluded that the 575 patent’s “inflatable protrusions” were not disclosed by the prior art. The Federal Circuit affirmed.
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