Gas separation – Specific media material – With coating – impregnant – or bonding agent
Reexamination Certificate
2006-02-28
2006-02-28
Lawrence, Frank M. (Department: 1724)
Gas separation
Specific media material
With coating, impregnant, or bonding agent
C096S132000, C096S153000, C502S417000
Reexamination Certificate
active
07004990
ABSTRACT:
Filter systems that are effective against a broad range of contaminants including HCN, cyanogen chloride (CK), acid contaminants and basic contaminants such as ammonia without the need (but with the option, if desired) for using molybdenum or chromium containing materials. The filtering systems of the present invention include a tungsten-based material and other impregnants incorporated into a substrate such as filter media particles.
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Brey Larry A.
Smith Simon J.
Weagle Glenn E.
3M Innovative Properties Company
Hanson Karl G.
Kagan David B.
Lawrence Frank M.
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