Davis-Lynch Fails To Nix Defense In Drilling IP Suit

By Ryan Davis

Law360, New York (November 20, 2009, 12:23 PM ET) -- A federal judge has denied oil field services company Davis-Lynch Inc.’s request to throw out rival Weatherford International Inc.’s inequitable conduct defense in a patent infringement suit over oil and gas drilling technology.

Judge John D. Love of the U.S. District Court for the Eastern District of Texas on Thursday denied Davis-Lynch's motion for summary judgment on the inequitable conduct claim, finding that issues of material fact remained.

Davis-Lynch's suit, filed in 2007, accuses Weatherford selling a product called the auto-fill float collar that infringes a...
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