News International Sugar Journal

Patent fight between isobutanol producers Butamax and Gevo intensifies [Registered]

Butamax recently won a Federal Circuit appeal (in a US court) that nulls previous District Court rulings favouring Gevo over Butamax in a patent infringement lawsuit covering Butamax’s patents ‘188 and ‘889. The ‘188 patent covers a recombinant microbial host cell that uses a particular biosynthetic pathway to produce isobutanol. The ‘889 patent focuses on a method of producing isobutanol from a recombinant yeast microorganism. The claims of the two Butamax patents are currently under reexamination at the US Patent and Trademark Office (USPTO), which has declared them unpatentable. Gevo believes it does not infringe any valid claims, and reported…

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