Method and apparatus for producing a wood-like flame appearance from a fireplace-type gas burner
Patent 4992041 Issued on February 12, 1991. Estimated Expiration Date: 
November 13, 2009. 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.
November 13, 2009. 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.Patent References 249362 312452 808513 2391988 2463988 3747585 3831582 3925001 Flame coloring device Regulation of blue flame combustion emissions Inventors
AssigneeApplicationNo. 437699 filed on 11/13/1989US Classes:431/126, WITH ORNAMENTATION OR FLAME COLORING ADDITIVE126/92R, Incandescent fire grate431/4, Feeding flame modifying additive431/347INCANDESCING OR REFLECTING COMPONENT, E.G., REIGNITING HOT SPOT, ETC.ExaminersPrimary: Dority, Carroll B.Attorney, Agent or FirmForeign Patent References
International ClassF23Q 002/08AbstractAn apparatus for coloring gas flames in gas-burning fireplaces so as to give the appearance of a wood-burning fireplace comprises a ceramic tube having a coating which causes colorization of gas flames when the coated tube is placed in the secondary reaction zone of a gas flame. Principle coating ingredients include sodium carbonate, aluminum oxide, pulverized soda lime glass, and sodium silicate. The coating is baked onto the ceramic tube, and, when located in the secondary reaction zone of a flame, will provide nearly constant natural color to a gas flame for periods in excess of 1000 hours.Other References
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