George E Tradewell

US Patent:

44445741, Apr 24, 1984

Filed:

Oct 6, 1982

Appl. No.:

6/433154

Inventors:

George Tradewell - Jim Thorpe PA
W. Novis Smith - Philadelphia PA

International Classification:

B01D 4604

US Classification:

55 96

Abstract:

A filter for extracting solids and liquids from gaseous combustion exhausts comprises a textile filter element formed of polyacrylonitrile fibers oxidized by careful heat treatment and comprising approximately 61% carbon after treatment. The filter may be woven, knitted or formed as a batting of randomly-oriented fibers. Abrasion resistant coatings and lubricants for the fibers are disclosed. The filter material is especially useful as a filter bag.