Patent Case Watch

Patent opinions from the Eastern District of Texas and the U.S. Court of Appeals for the Federal Circuit

Fed. Cir.

Equistar Chemicals, LP v. Westlake Chemical Corporation, No. 17-1548 (Fed. Cir. July 3, 2018)

Affirmed in Part
Infringement Invalidity (§ 102/§ 103)
Court
U.S. Court of Appeals for the Federal Circuit
Case No.
No. 17-1548
Also Docketed
No. 17-1549 (consolidated; same document)
Decided
July 3, 2018
Judge
Dyk, J.
Document
Nonprecedential Opinion
Length
9 pages

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

Equistar Chemicals, LP and MSI Technology, LLC (collectively “Equistar”) brought suit for infringement of U.S. Patent No. 7,064,163 (“the ’163 patent”) against Westlake Chemical Corporation (“Westlake”) in the District Court for the Eastern District of Texas. Westlake asserted various counterclaims of invalidity. We affirm the judgment of noninfringement and the judgment of no invalidity with respect to anticipation and obviousness . We vacate the grant of summary judgment rejecting the on-sale bar defense, and remand for further proceedings.

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Source: govinfo.gov USCOURTS collection · retrieved July 23, 2026 · Report an error