Patent US3714949A successfully refreshed from Google Patents.
US3714949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette filter
Assignee: Individual
•
Filing: 1971-02-16
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Granted: 1973-02-06
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Expires: 1991-02-16
Abstract
Abstract Filtering means for tobacco wherein the filter is composed of a permselective membrane supported in juxtaposition to the tobacco. Upon the application of the smoking process upon the tobacco, the smoke from he tobacco passes through the membrane and deposits the harmful tar particles and nicotine vapors on the membrane, allowing less harmful gas to pass into the mouth of the smoker.
Inventors
- 👤 D King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
219 words
A filtering means for use in a smoking process comprising a mouthpiece forming a cylindrical smoke chamber, one end of which is adapted to enter the mouth of a smoker and the other end of which is connectable to the downstream end of a body of tobacco, said mouthpiece being cylindrical in form, a plurality of spaced ridges extending from the inner wall of said mouthpiece inwardly into said smoke chamber, a filter element comprising a cylindrical porous smoke pervious membrane in the form of a cup member located in said smoke chamber with the closed end of said filter member adjacent the end of the smoke chamber which is adapted to enter the mouth of the smoker and with the cylindrical wall of said membrane being spaced from and parallel with the wall of the smoke chamber and in contact with said ridges, said spacing being such as to provide a smoke passageway between the outer cylindrical wall of said membrane and the inner wall of said mouthpiece and thus smoke emanating from the body of tobacco will pass both through said smoke passageway and also directly through the closed end of said filter member, and means for sealingly securing the open end of said filter member throughout its circumference to the inner wall of said smoke chamber.
Claim 2
Dependent Claim
219 words
A filtering means for use in a smoking process comprising a mouthpiece forming a cylindrical smoke chamber, one end of which is adapted to enter the mouth of a smoker and the other end of which is connectable to the downstream end of a body of tobacco, said mouthpiece being cylindrical in form, a plurality of spaced ridges extending from the inner wall of said mouthpiece inwardly into said smoke chamber, a filter element comprising a cylindrical porous smoke pervious membrane in the form of a cup member located in said smoke chamber with the closed end of said filter member adjacent the end of the smoke chamber which is adapted to enter the mouth of the smoker and with the cylindrical wall of said membrane being spaced from and parallel with the wall of the smoke chamber and in contact with said ridges, said spacing being such as to provide a smoke passageway between the outer cylindrical wall of said membrane and the inner wall of said mouthpiece and thus smoke emanating from the body of tobacco will pass both through said smoke passageway and also directly through the closed end of said filter member, and means for sealingly securing the open end of said filter member throughout its circumference to the inner wall of said smoke chamber.
Claim 3
Dependent Claim
15 words
A filtering means as described in claim 1 wherein said membrane is a silicone membrane.
Claim 4
Dependent Claim
22 words
A cigarette as described in claim 2 wherein the thickness of said membrane ranges from about 0.0001 inches to about 0.0002 inches.
Claim 5
Dependent Claim
41 words
A cigarette as described in claim 1 wherein said mouthpiece further includes a perforate partition supported within said mouthpiece adjacent said end adapted to enter said mouth of said smoker for maintaining said membrane away from the tongue of said smoker.
Claim 6
Dependent Claim
23 words
A cigarette as described in claim 1 wherein said partition is recessed from said end adapted to enter said mouth of said smoker.
Claim 7
Dependent Claim
14 words
A cigarette as described in claim 5 wherein said partition is cross-shaped in design.
Claim 8
Dependent Claim
15 words
A filtering means as in claim 5 wherein said membrane is secured to said partition.
Claim 9
Dependent Claim
17 words
A filtering means as in claim 1 wherein said ridges are in the form of annular rings.
Claim 10
Dependent Claim
13 words
A filtering means as in claim 8 wherein said ridges are inwardly tapered.
References Cited (Backward Citations)
DE301484C
Cited
GB190020570A
Cited
AT68658B
Cited
AT153520B
Cited
US3066681A
Cited
US3394713A
Cited
US3489144A
Cited
US3533416A
Cited
US3621851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |