MEMORANDUM OPINION
SUE L. ROBINSON, Chief Judge.
On December 22, 2003, Praxair, Inc. and Praxair Technologies, Inc. (collectively called "Praxair") filed this action against ATMI, Inc. and Advanced Technology Materials, Inc. (collectively called "ATMI") for infringement of certain claims of United States Patent Nos. 6,045,115 ("the '115 patent"), 6,007,609 ("the '609 patent") and 5,937,895 ("the '895 patent"). (D.I.1...
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