US4108151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma alumina filled paper wrapper for smoking articles
Assignee: Magnera Corp
•
Filing: 1977-03-10
•
Granted: 1978-08-22
•
Expires: 1997-03-10
Abstract
Abstract Cigarette paper containing a filler of gamma alumina, for selectively reducing the organic vapor phase constituents in tobacco smoke. The paper is comprised of cellulosic fibers and a gamma alumina filler with the amount of alumina filler present being at least 50% by weight based on the weight of the paper. Preferably, the amount of gamma alumina filler will range from 50 to 80%. In addition to reducing organic vapor phase constituents, the paper has unique advantages over conventional cigarette paper wrappers in that the visible sidestream smoke eminating from the smoking article is reduced.
Inventors
- 👤 R. Hugo Martin
- 👤 William F. Owens, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:15
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16; A; A24; A24D; A24D1/00; A24D1/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A combustible cigarette paper that is effective in selectively reducing the vapor phase constituents in tobacco smoke, comprising cellulose fibers and a gamma alumina filler, substantially free of other crystalline forms of alumina said cigarette paper containing from 50 to 80% of said gamma alumina filler based on the weight of the filled paper, said gamma alumina filler pulverized to pass through a 300-mesh screen.
Claim 2
Dependent Claim
65 words
A combustible cigarette paper that is effective in selectively reducing the vapor phase constituents in tobacco smoke, comprising cellulose fibers and a gamma alumina filler, substantially free of other crystalline forms of alumina said cigarette paper containing from 50 to 80% of said gamma alumina filler based on the weight of the filled paper, said gamma alumina filler pulverized to pass through a 300-mesh screen.
Claim 3
Independent Claim
59 words
A method for selectively reducing the vapor phase constituents in tobacco smoke from a smoking article comprising uniformly dispersing in the tobacco column wrapper for said smoking article at least 50% by weight of finely pulverized gamma alumina filler based upon the weight of the filled wrapper said gamma alumina filler substantially free of other crystalline forms of alumina.
Claim 4
Independent Claim
59 words
A method for selectively reducing the vapor phase constituents in tobacco smoke from a smoking article comprising uniformly dispersing in the tobacco column wrapper for said smoking article at least 50% by weight of finely pulverized gamma alumina filler based upon the weight of the filled wrapper said gamma alumina filler substantially free of other crystalline forms of alumina.
Claim 5
Independent Claim
63 words
A method for selectively reducing the vapor phase constituents in cigarette smoke comprising enclosing the tobacco column of the cigarette with cigarette paper made from cellulose fiber and a filler of finely pulverized gamma alumina, substantially free of other crystalline forms of alumina said paper containing from 50 to 80% by weight gamma alumina filler based on the weight of the filled paper.
Claim 6
Independent Claim
63 words
A method for selectively reducing the vapor phase constituents in cigarette smoke comprising enclosing the tobacco column of the cigarette with cigarette paper made from cellulose fiber and a filler of finely pulverized gamma alumina, substantially free of other crystalline forms of alumina said paper containing from 50 to 80% by weight gamma alumina filler based on the weight of the filled paper.
Claim 7
Dependent Claim
19 words
The method of claim 3 in which the gamma alumina filler is pulverized to pass through a 300-mesh screen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |