Patent 4997457 Issued on March 5, 1991. Estimated Expiration Date: January 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
A solid gelled fuel for producing a visible flame of various colors, which contains methyl alcohol as a primary ingredient in a solid gel with the addition of dibenzylidene sorbitol, cellulose ester and ethylene glycol, with a flame coloring compound being suspended in the solid.