Gas separation: apparatus – Solid sorbent apparatus – Layered or laminated
Reexamination Certificate
2004-08-24
2008-11-18
Smith, Duane (Department: 1797)
Gas separation: apparatus
Solid sorbent apparatus
Layered or laminated
C055S486000, C055S524000, C055S527000, C422S177000
Reexamination Certificate
active
07452412
ABSTRACT:
A high-efficiency filter for removing or collecting trace levels of chemical compounds includes a randomly oriented glass substrate, a primer coating and a carbon coating. The present filter is operable to sample or remove chemical compounds from the air with a high volumetric capacity while maintaining a low pressure drop across the filter substrate. A method for making the present filter includes providing a glass substrate with randomly oriented glass fibers which is treated to remove any glue or other substances; the substrate is then coated with a primer including polydimethylsiloxane; and the primed substrate is then coated with a carbonaceous compound including polydimethylsiloxane.
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Cooper Gary
Cummins Stephen B.
Radolovich Gil
Husch Blackwell Sanders LLP
Midwest Research Institute, Inc.
Smith Duane
Wu Ives
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