Self-regulating heat pack
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United States of America Patent
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Nov 16, 1999
Issued Date -
N/A
app pub date -
May 21, 1998
filing date -
May 21, 1998
priority date (Note) -
Expired
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Abstract
The invention relates to a self-heating, disposable heating pack utilizing an exothermic chemical reaction. Self-moderation of the heat pack is provided through the use of a preformed reversibly stiffenable gel that alters the rate of exothermic chemical reactions. A vaporizable solvent is used to adjust the gel stiffness. The heat pack can be used in heat transfer or ambient temperature conditions which differ from those anticipated as design conditions.
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