Whatsmynickname writes "Thought oil companies were done patent trolling to try to shut down any efforts to wean us off of crude oil (e.g. Chevron and NiMH batteries)? Think again. BP and DuPont (Butamax) have taken an advanced biofuel company to court over infringement of newly awarded patents for developing biobutanol. When an oil company advertises it is looking for alternative fuels, it's not necessarily because they want to be socially responsible..."