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NY company sues ND ethanol plant

BISMARCK (AP) -- A New York company that says it invented a process to help manufacture ethanol is suing a North Dakota plant for patent infringement.

GS Clean Tech Corp. filed the complaint in federal court against Blue Flint Ethanol LLC, which operates a plant at Underwood.

The lawsuit seeks unspecified damages and an injunction to stop Blue Flint from using the process, which recovers corn oil from a byproduct of ethanol.

A judge granted Blue Flint an extension until June 10 to respond to the lawsuit. Officials with the company did not return repeated phone messages left by The Associated Press.