Selective filtration device

Details Selective filtration device Selective filtration device

1994-08-23

1998-03-31

Asher, Kimberly L.

Tobacco

Smoke separator or treater

Plural diverse elements

131331, A24B 1500, A24B 1542, A24D 304, A24D 306

Patent

active

057327181

ABSTRACT:
Disclosed is a filter for tobacco smoke composed of at least one layer of a wet-formed absorbent fibrous nonwoven composite structure containing: 1) from about 30 to about 65 percent, by weight, of pulp fibers forming a matrix having a first exterior surface and a second exterior surface; and 2) about 35 to about 70 percent, by weight, of activated carbon integrated into the matrix of pulp fibers such that the concentration of activated carbon adjacent the first exterior surface is at least about 60 percent, as determined by optical image analysis, and the concentration of activated carbon adjacent the second exterior surface is less than about 40 percent, as determined by optical image analysis, so that the filter is adapted to selectively reduce the C.sub.3 -C.sub.4 carbonyl component of conventional tobacco smoke at least about 25 percent more than a conventional cellulose acetate filter for an identical tobacco smoke. Also disclosed is a method of making the filter.

REFERENCES:
patent: 2164702 (1939-07-01), Davidson
patent: 2792841 (1957-05-01), Larson
patent: 2801638 (1957-08-01), Schur et al.
patent: 2900989 (1959-08-01), Davidson
patent: 2954036 (1960-09-01), Schur et al.
patent: 3079929 (1963-03-01), Mueller
patent: 3161557 (1964-12-01), Muller
patent: 3180911 (1965-04-01), Muller
patent: 3347247 (1967-10-01), Lloyd
patent: 3413982 (1968-12-01), Sublett et al.
patent: 3518921 (1970-07-01), Muller
patent: 3658069 (1972-04-01), Wise et al.
patent: 3804695 (1974-04-01), Randall et al.
patent: 3805801 (1974-04-01), Berger et al.
patent: 3966912 (1976-06-01), Fair et al.
patent: 4219031 (1980-08-01), Rainer et al.
patent: 4274428 (1981-06-01), Muller et al.
patent: 4316475 (1982-02-01), Suzuki et al.
patent: 4411641 (1983-10-01), Suzuki et al.
patent: 4488563 (1984-12-01), Morifuji et al.
patent: 4516589 (1985-05-01), Rainer et al.
patent: 4583560 (1986-04-01), Sakai et al.
patent: 4807647 (1989-02-01), Hayes
patent: 5360023 (1994-11-01), Blakley et al.
Prior Sale of Carbon-Containing Paper Sheets.
The Taryton.RTM. Cigarette Filter.
Database WPI, Week 8547, Derwent Publications Ltd., London, GB; AN 85-293580 & JP,A,60 202 734 (Toyobo), 14 Oct. 1985, See Abstract.
Patent Abstracts of Japan, vol. 003 No. 003 (C-033), 16 Jan. 1979 & JP,A,53 127899 (Japan Tobacco Inc.) 08 Nov. 1978, See Abstract.
PCT Search Report.

Affiliated with

Also associated with

Rating

Selective filtration device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective filtration device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective filtration device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-44154