USPTO rejects Butamax’s claims in successful Gevo reexamination petition

ERJ staff report (LMH)

Englewood, Colorado – The US Patent and Trademark Office (USPTO) has rejected all patent claims of Butamax Advanced Biofuels covering isobutanol-producing yeast in US Patent No. 7 851 188 (‘188 patent), which is currently being asserted against biotechnology company Gevo.

In doing so, the USPTO has now rejected all requested claims and correspondingly every critical claim in both patents asserted against Gevo by Butamax. In August, Gevo successfully petitioned the USPTO to reexamine Butamax’s claims in US Patent No. 7 993 889…

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