DYK, Circuit Judge.
Plaintiffs Praxair, Inc. and Praxair Technology, Inc. (collectively "Praxair") brought suit alleging that defendants ATMI, Inc. and Advanced Technology Materials, Inc. (collectively "ATMI") had infringed three patents: U.S. Patent No. 6,007,609 (the "'609 patent"); U.S. Patent No. 6,045,115 (the "'115 patent"), and U.S. Patent No. 5,937,895 (the "'895 patent"). The district court entered a final judgment concluding that claims 1, 2, 6, 7, and 8...
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