DA Nano, Cabot Patent Battle To Roll On

Law360, New York (November 30, 2009, 2:29 PM ET) -- A federal judge has denied DuPont Air Products NanoMaterials LLC's and Cabot Microelectronics Corp.'s separate bids for summary judgment in DA Nano's infringement suit over four Cabot patents for tungsten chemical mechanical planarization.

Judge Roslyn O. Silver of the U.S. District Court for the District of Arizona originally issued a sealed order denying the parties' summary judgment motions Nov. 17, but she approved Cabot's unopposed motion to docket a public version of the ruling on Wednesday.

In the redacted order Judge Silver ruled that DA Nano...
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