US4624268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking articles
Assignee: British American Tobacco Investments Ltd
•
Filing: 1984-05-02
•
Granted: 1986-11-25
•
Expires: 2004-05-02
Abstract
Abstract A smoking article such as a cigarette comprising a smoking-material rod enwrapped in a wrapper paper with an inherent air permeability of 3 to 45 Coresta units and comprising at least one hydroxide compound and at least one organic compound of the group comprising lithium hydroxide, aluminum hydroxide, calcium hydroxide, potassium formate, sodium formate and sodium acetate, at a total loading level of the compounds of not less than two g/m 2 whereby the total particulate matter (TPM) in the side-stream-smoke emanating from the lit end of said article during the smoking thereof is reduced by at least 30% in relation to the TPM which emanates from the lit end of an otherwise identical smoking article comprising conventional wrapper paper and smoked under the same smoking conditions.
Inventors
- 👤 Richard R. Baker
- 👤 Frederick J. Dashley
- 👤 Anthony D. McCormack
- 👤 Colin C. Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:52
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/02; D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A smoking article comprising a smoking-material rod enwrapped in a wrapper paper comprising at least one hydroxide compound and at least one organic compound of the group consisting of lithium hydroxide, aluminum hydroxide, calcium hydroxide, potassium formate, sodium formate and sodium acetate, at a total loading level of the compounds of not less than two g/m 2 , whereby the total particulate matter (TPM) in the sidestream-smoke emanating from the lit end of said article during the smoking thereof is reduced by at least 30% in relation to the TPM which emanates from the lit end of an otherwise identical smoking article comprising conventional wrapper paper and smoked under the same smoking conditions.
Claim 2
Dependent Claim
113 words
A smoking article comprising a smoking-material rod enwrapped in a wrapper paper comprising at least one hydroxide compound and at least one organic compound of the group consisting of lithium hydroxide, aluminum hydroxide, calcium hydroxide, potassium formate, sodium formate and sodium acetate, at a total loading level of the compounds of not less than two g/m 2 , whereby the total particulate matter (TPM) in the sidestream-smoke emanating from the lit end of said article during the smoking thereof is reduced by at least 30% in relation to the TPM which emanates from the lit end of an otherwise identical smoking article comprising conventional wrapper paper and smoked under the same smoking conditions.
Claim 3
Dependent Claim
17 words
A smoking article according to claim 1, the said reduction in sidestream TPM being at least 40%.
Claim 4
Dependent Claim
26 words
A smoking article according to claim 1, wherein the inherent air permeability of said wrapper paper is within a range of 3 to 45 Coresta units.
Claim 5
Dependent Claim
23 words
A smoking article according to claim 3, wherein said permeability of said wrapper is within a range of 3 to 20 Coresta units.
Claim 6
Dependent Claim
23 words
A smoking article according to claim 3, wherein said permeability of said wrapper is within a range of 3 to 10 Coresta units.
Claim 7
Dependent Claim
21 words
A smoking article according to claim 1, wherein said wrapper paper comprises three or more of said compounds of said group.
Claim 8
Dependent Claim
20 words
A smoking article according to claim 1, wherein said wrapper paper comprises at least two organic compounds of said group.
Claim 9
Dependent Claim
25 words
A smoking article according to claim 1, wherein the loading level of an organic compound of said group does not exceed three g/m 2 .
Claim 10
Dependent Claim
24 words
A smoking article according to claim 1, wherein the loading level of hydroxide compound of said group is at least two g/m 2 .
Claim 11
Dependent Claim
24 words
A smoking article as claimed in claim 1, wherein the rate of production of sidestream TPM does not exceed two mg min -1 .
Claim 12
Dependent Claim
14 words
A smoking article according to claim 1, wherein said wrapper paper comprises calcium hydroxide.
Claim 13
Dependent Claim
106 words
A smoking article wrapper paper comprising at least one hydroxide compound and at least one organic compound of the group consisting of lithium hydroxide, aluminum hydroxide, calcium hydroxide, potassium formate, sodium formate and sodium acetate, at a total loading level of the compounds, of not less than two g/m 2 , whereby the total particulate matter (TPM) in the sidestream-smoke emanating from the lit end of said article during the smoking thereof is reduced by at least 30% in relation to the TPM which emanates from the lit end of an otherwise identical smoking article comprising conventional wrapper paper and smoked under the same smoking conditions.
Claim 14
Dependent Claim
106 words
A smoking article wrapper paper comprising at least one hydroxide compound and at least one organic compound of the group consisting of lithium hydroxide, aluminum hydroxide, calcium hydroxide, potassium formate, sodium formate and sodium acetate, at a total loading level of the compounds, of not less than two g/m 2 , whereby the total particulate matter (TPM) in the sidestream-smoke emanating from the lit end of said article during the smoking thereof is reduced by at least 30% in relation to the TPM which emanates from the lit end of an otherwise identical smoking article comprising conventional wrapper paper and smoked under the same smoking conditions.
References Cited (Backward Citations)
US3744496A
Cited
US4231377A
Cited
US4407308A
Cited
US4461311A
Cited
US4461311B1
Cited
US4420002A
Cited
US4433697A
Cited
US4450847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |