The fluidized bed boiler system that has enabled current ethanol producer Corn Plus LLLP in Winnebago, Minn., to reduce its natural gas usage by half is now patented and available on the market. The biomass-fueled, steam production technology will be marketed, designed, installed and financed through a partnership of four companies: Interstate Power and Light Co., a subsidiary of Alliant Energy Corp.; Harris Cos., a mechanical contracting firm; AE&E-Von Roll Inc., a technology provider of steam-generating systems; and FCStone Carbon LLC. The first three companies patented the technology application, while FCStone Carbon will provide the marketing services and arrange financing options for ethanol producers interested in the technology.