Legal Opinion
The Dow Chemical Company v. Sumitomo Chemical Company, Ltd. And Sumitomo Chemical America, Inc.
Court of Appeals for the Federal Circuit
Decided July 27, 2001No. 00-1441PublishedCited by 97 opinions
1Opinion of the Court
GAJARSA, Circuit Judge.
This is a patent infringement action. The Dow Chemical Company (“Dow”) is the assignee of United States Patent No. 4,499,255 (“the '255 patent”), which is directed to a process for making high-purity epoxy resins. In 1996, Dow brought this patent infringement action against Sumito-mo Chemical Company, Ltd. and Sumito-mo Chemical America, Inc. (collectively “Sumitomo”), alleging that certain processes used by Sumitomo infringe the '255 patent. On June 20, 2000, the United States District Court for the Eastern District of Michigan (“district court”) determined that…
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