http://synbioproject.tech/cpi/companies/butamax/
Butamax Advanced Biofuels LLC is based in Wilmington, Delaware, USA and was formed in July 2009 as a leader in biobutanol technology and marketing. Butamax is the evolution of the partnership between BP and DuPont and follows four years of extensive technology development and fuel testing. Butamax will complete the ongoing biobutanol research and development program to bring biobutanol to market.