Flame coloring device
Patent 4472135 Issued on September 18, 1984. Estimated Expiration Date: 
February 23, 2002. 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.
February 23, 2002. 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 808513 1829001 2270443 2809101 3187523 3385647 3468615 3504976 3816062 InventorsAssigneeApplicationNo. 06/351676 filed on 02/23/1982US Classes:431/126, WITH ORNAMENTATION OR FLAME COLORING ADDITIVE356/315By flameExaminersPrimary: Dority, Carroll B.Attorney, Agent or FirmInternational ClassesG08B 5/40 (20060101)F23M 11/00 (20060101) F23M 11/04 (20060101) G08B 5/00 (20060101) AbstractA flame coloring device makes a flame, such as a flame from a propane burner, visible even when the burner is used outdoors or in a bright environment. The device includes a carrier adapted for placement on the burner barrel and a solid colorant emitter such as sodium chloride supported by the carrier. When the carrier and colorant emitter are heated by the burner flame, the emitter emits a material that provides visible light, thereby defining the flame.Other References
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