Title:
TOBACCO SMOKE FILTERS
United States Patent 3470883
US Patent References:
Filter for tobacco smoke
- - 2739598
Ion-exchange fibers, films and the like from sulfur containing alkoxymethyl monomers
- - 2933460
Cellulosic copolymer filter material
- - 3366582
Filter for tobacco smoke
- - 2739598
Ion-exchange fibers, films and the like from sulfur containing alkoxymethyl monomers
- - 2933460
Cellulosic copolymer filter material
- - 3366582
Inventors:
Shepherd, Thomas H.
Gould, Francis E.
Gould, Francis E.
Publication Date:
10/07/1969
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Export Citation:
Assignee:
NAT PATENT DEV CORP
Primary Class:
Other Classes:
521/150, 521/905, 521/149
International Classes:
A24D3/08; A24D3/00; A24D1/06