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Patent-infringement claim dismissed in long-running isobutanol feud

9:32 AM MDT | May 10, 2013 | Rebecca Coons

Butamax Advanced Biofuels, an isobutanol joint venture owned by DuPont and BP, says the US District Court for the District of Delaware has issued an order dismissing claims by Gevo that Butamax infringed its 8,101,808 ('808)  patent  covering Gevo's GIFT isobutanol removal technology—the latest development in a two-year patent spat that has seen both sides file multiple infringement suits. According to Butamax, "[U]nder reexamination, all of the original claims of the '808 patent were rejected, and all modified and added claims were...

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