Flexible electrochemical heater
Patent 4522190 Issued on June 11, 1985. Estimated Expiration Date: 
November 3, 2003. 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 3, 2003. 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 1899286 3512516 3683889 3774589 3874504 Sandwiched structure for production of heat and hydrogen gas Heating pack containing a granular chemical composition Method for production of heat and hydrogen gas Powdered metal source for production of heat and hydrogen gas Exothermic composition and hot pack InventorsAssigneeApplicationNo. 06/548541 filed on 11/03/1983US Classes:126/263.02, Oxidation with air126/204, BODY WARMERS149/19.91, Polymerized ethylenically unsaturated compound204/248, Internal battery420/402, MAGNESIUM BASE44/253, With organic or second elemental material521/92, Ingredient contains a metal atom75/230, With nonmetal constituent - Silicon(Si) considered a metal (e.g., cermet, etc.)75/252Mixture contains particles of nonmetalExaminersPrimary: Scott, SamuelAssistant: Odar, Helen Ann International ClassesF24J 1/00 (20060101)B65D 81/34 (20060101) AbstractThis invention is for an inexpensive flexible heater material (heat pad) for food heating, medical compresses and the like. The heat pad is a composite material consisting of a supercorroding metallic alloy powder dispersed throughout a porous polyethylene matrix. The supercorroding alloy material consists of a powdered alloy of magnesium and iron which is produced by high energy powder metallurgical milling techniques. Pressureless sintering of a mixture of the supercorroding alloy powders with UHMW polyethylene powder results in the formation of a flexible porous matrix material with active ingredients therein that are readily activated with a suitable electrolyte fluid. |
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