Bell annealing furnace
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United States of America Patent
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Jan 28, 2014
Grant Date -
N/A
app pub date -
Apr 13, 2009
filing date -
Apr 13, 2009
priority date (Note) -
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Abstract
Thermal protective layer on metallic and/or ceramic substrate surfaces within/on an outer cover, an inner cover, a base/door, and/or a support member within a bell annealing furnace has from about 5% to about 30% of an inorganic adhesive, from about 45% to about 92% of a filler and from about 1% to about 20% of one or more emissivity agents, or from about 5% to about 35% of colloidal silica, colloidal alumina, or combinations thereof, from about 23% to about 79% of a filler, and from about 1% to about 20% of one or more emissivity agents.
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