US4121599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Brown and Williamson Holdings Inc
•
Filing: 1976-09-01
•
Granted: 1978-10-24
•
Expires: 1996-09-01
Abstract
Abstract A filter for treating fluids, particularly tobacco smoke, is described having a filter media prepared from a wide variety of fungal mycelia or yeasts.
Inventors
- 👤 Richard Paul Newton
- 👤 Lawrence Edmond Gravely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:07
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/067; A24D3/068
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
42 words
An improved tobacco smoke filter useful in the filtration of a gaseous fluid comprised of a container and a filter media in particulate form within said container, said filter media being selected from the group consisting essentially of fungal mycelia and yeast.
Claim 2
Dependent Claim
42 words
An improved tobacco smoke filter useful in the filtration of a gaseous fluid comprised of a container and a filter media in particulate form within said container, said filter media being selected from the group consisting essentially of fungal mycelia and yeast.
Claim 3
Dependent Claim
24 words
The filter of claim 1, wherein said container is comprised of a body portion having openings therein permitting ingress and egress of said fluid.
Claim 4
Dependent Claim
14 words
The filter of claim 1, wherein said container is a cylindrical wrapper of paper.
Claim 5
Dependent Claim
20 words
The filter of claim 1, wherein said filter media is selected from the classes Phycomycetes, Ascomycetes, Fungi Imperfecti and Basidiomycetes.
Claim 6
Dependent Claim
25 words
The filter of claim 1, wherein said filter media has an average particle size in the range of from about 125 to about 3,300 microns.
Claim 7
Dependent Claim
14 words
The filter of claim 1, wherein said filter media is agglomerated with a binder.
Claim 8
Dependent Claim
23 words
The filter of claim 6, wherein said binder is selected from the group consisting of carboxymethyl cellulose, glycerol, methyl cellulose and corn syrup.
Claim 9
Dependent Claim
60 words
An improved cigarette filter adapted to be attached to a tobacco column of a given diameter comprised of cylindrical filter wrapper having a diameter substantially equal to a said given diameter and a filter media in particulate form within a said wrapper, said filter media consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 10
Dependent Claim
60 words
An improved cigarette filter adapted to be attached to a tobacco column of a given diameter comprised of cylindrical filter wrapper having a diameter substantially equal to a said given diameter and a filter media in particulate form within a said wrapper, said filter media consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 11
Dependent Claim
19 words
The filter of claim 8, being additionally comprised of a second filter segment in axial alignment with said filter.
Claim 12
Dependent Claim
16 words
The cigarette filter of claim 9, wherein said second filter segment is comprised of cellulose acetate.
Claim 13
Dependent Claim
55 words
A cigarette comprised of a tobacco column enclosed in a cylindrical tobacco wrapper and a filter positioned at one end of said tobacco column, said filter being comprised of a cylindrical filter wrapper surrounding a filter media in particulate form consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 14
Dependent Claim
55 words
A cigarette comprised of a tobacco column enclosed in a cylindrical tobacco wrapper and a filter positioned at one end of said tobacco column, said filter being comprised of a cylindrical filter wrapper surrounding a filter media in particulate form consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 15
Dependent Claim
22 words
The cigarette of claim 11, further comprised of a second filtration segment in axial alignment with said tobacco column and said filter.
Claim 16
Dependent Claim
19 words
The cigarette of claim 12, wherein said second filtration segment is positioned opposite said filter from said tobacco column.
Claim 17
Dependent Claim
19 words
The cigarette of claim 12, wherein said second filtration segment is positioned between said filter and said tobacco column.
Claim 18
Dependent Claim
33 words
An improved method for filtering tobacco smoke comprising passing said smoke through a filter media in particulate form consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 19
Dependent Claim
33 words
An improved method for filtering tobacco smoke comprising passing said smoke through a filter media in particulate form consisting essentially of a material selected from the group consisting of fungal mycelia and yeast.
Claim 20
Dependent Claim
20 words
The method of claim 15, wherein said filter media is selected from the classes Phycomycetes, Ascomycetes, Fungi Imperfecti and Basidiomycetes.
References Cited (Backward Citations)
US3246655A
Cited
US3353317A
Cited
FR2151814A5
Cited
US4021368A
Cited
US4067821A
Cited
US4071037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |