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Vague Phrase In Patent Invalidates Claim: Court

By Brendan Pierson ( January 25, 2008, 12:00 AM EST) -- An appellate judge has affirmed a lower court's dismissal of a patent lawsuit brought by Halliburton Energy Services Inc. against rival M-I LLC, agreeing with the lower court that a key term in the patent was vague enough that the patent claims could not be construed....

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