Impregnation for respirator filters filled with active carbon
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United States of America Patent
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May 19, 1992
Grant Date -
N/A
app pub date -
Apr 4, 1991
filing date -
Apr 6, 1990
priority date (Note) -
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Abstract
An impregnation for respirator filters, filled with active carbon, containing at least two of the known vanadium, copper, manganese, and zinc compounds, which occur as the vanadate, oxide, carbonate, or chloride, with addition of an oxo acid, shall be improved such that the stability of the respirator filters during storage will be improved. To accomplish this task, tungstic acid, molybdic acid, permanganic acid, stannic acid, or phosphoric acid is added.
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