Surface-modified porous substrates

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United States of America Patent

APP PUB NO 20070295347A1
SERIAL NO

11707169

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Abstract

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The surfaces of porous sorbent materials are chemically modified to specifically target the adsorption of select gas phase constituents. More specifically, a functionalized cobalt (II) phthalocyanine-modified porous substrate capable of nitric oxide adsorption from a gas stream is provided. A soluble cobalt (II) phthalocyanine compound can be incorporated in a porous substrate by grafting soluble cobalt (II) phthalocyanine molecules onto a functionalized substrate. In an exemplary case, a cigarette filter element comprises the substrate, which can be an imidazole-functionalized silica gel or an activated carbon of high surface area and permeability, and the gas stream is the mainstream smoke of a cigarette.

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Patent Owner(s)

Patent OwnerAddress
PHILIP MORRIS USA INC6601 WEST BROAD STREET RICHMOND VA 23230-1723

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cashon, Robert Old Town, ME 1 69
Cassidy, David Bangor, ME 20 1079
DeSisto, William Orono, ME 1 69
Fournier, JayA Richmond, VA 11 388
Paine, John B III Midlothian, VA 12 341

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