IHS Chemical Week

Both Sides Claim Victory in Isobutanol Patent Fray

4:22 PM MST | December 6, 2011 | Rebecca Coons

Butamax Advanced Biofuels (Wilmington, DE) and Gevo (Englewood, CA) are both claiming a victory in their ongoing patent dispute after the U.S. Patent and Trademark Office (USPTO) responded to an earlier Gevo request that two Butamax patents covering isobutanol production methods be reexamined and found invalid. According to Butamax, the USPTO  granted only “limited reexamination” of one of two Butamax patents Gevo requested be reexamined earlier this year. “According to USPTO statistics, 95% of reexamine requests are granted,” says...


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