USPTO to re-examine one Butamax patent in Gevo-Butamax dispute : Biofuels Digest

In Colorado, Gevo Inc. announced the U.S. Patent and Trademark Office is reconsidering a patent issued in August to Butamax Advanced Biofuels LLC for a fuel additive. Gevo claims that, “substantial questions exist regarding whether others invented this technology first and that several scientific journal publications had described the technology before Butamax applied for the patent.