There are not really a lot of bio-isobutanol producers out there — the blog counts three right now and two of them are at each other’s throats when it comes to patents.
Both US-based Gevo and Butamax (the biobutanol business of DuPont and BP) have been going at it for a year now when Butamax first filed an infringement lawsuit in January last year regarding a patent (7,851,188) that Butamax received from the US Patent and Trademark Office (USPTO) on December 2010.
In August 2011, Gevo asked the USPTO to invalidate the patent ‘188 and as well Butamax’s patent 7,993,889 (granted to Butamax that month) which covers methods for low-cost bio-isobutanol production.
Tags: patents, low-cost bio-isobutanol production
Source: ICIS, 2012-02-01.