US4147172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking mixtures
Assignee: Imperial Group PLC
•
Filing: 1977-06-14
•
Granted: 1979-04-03
•
Expires: 1997-06-14
Abstract
Abstract A smoking material in film form comprising a film-forming binder, inorganic filler and a smectite, particularly a bentonite, which smectite is finely dispersed throughout the material. Fine dispersion is achieved by high energy input during mixing with water, and results in improved ash coherence and greater combustion retardance by the smectite. The materials are characterized by relatively low air porosity.
Inventors
- 👤 Alan Calder
- 👤 Alan J. Herd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:59
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A process for the manufacture of a smoking material from ingredients comprising a combustible film forming binder, inorganic filler and a smectite which process comprises dispersing the smectite separately in water by agitation to produce a slurry having a viscosity not less than that of a slurry made from the same smectite and water by agitation at 15° C. with an energy input of 0.04 joules/g/sec until a maximum viscosity is reached, thereafter mixing the slurry with the remaining ingredients and fabricating the resultant slurry mixture into a form from which a tobacco-simulating material is obtainable.
Claim 2
Dependent Claim
96 words
A process for the manufacture of a smoking material from ingredients comprising a combustible film forming binder, inorganic filler and a smectite which process comprises dispersing the smectite separately in water by agitation to produce a slurry having a viscosity not less than that of a slurry made from the same smectite and water by agitation at 15° C. with an energy input of 0.04 joules/g/sec until a maximum viscosity is reached, thereafter mixing the slurry with the remaining ingredients and fabricating the resultant slurry mixture into a form from which a tobacco-simulating material is obtainable.
Claim 3
Dependent Claim
45 words
A process according to claim 1 wherein the viscosity of the smectite slurry is not less than that of a slurry made from the same smectite and water by agitation at 15° C. with an input of 0.08 joules/g/sec until a maximum viscosity is reached.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein the smectite is a bentonite.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein the combustible film-forming binder is the only combustible ingredient of the smoking material.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein the ingredients further comprise a non-binding fuel.
Claim 7
Dependent Claim
14 words
A process according to claim 1 wherein the ingredients further comprise a particulate fuel.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein the particulate fuel is a thermally degraded carbohydrate.
Claim 9
Dependent Claim
14 words
A process according to claim 6 wherein the particulate fuel is thermally degraded cellulose.
Claim 10
Dependent Claim
13 words
A process according to claim 1 wherein the film-forming binder is sodium carboxymethylcellulose.
Claim 11
Dependent Claim
19 words
A process according to claim 1 wherein the inorganic filler constitutes 40 to 65% by weight of the ingredient.
Claim 12
Dependent Claim
43 words
A process according to claim 1 wherein the ingredients are constituted by 10-50% by weight of film-forming binder, 0-30% by weight of particulate fuel, 40-65% by weight of inorganic filler, 3-10% by weight of smectite and 0-10% by weight of humectants and flavourants.
Claim 13
Dependent Claim
19 words
A process according to claim 1 wherein the smectite constitutes 3-7% by weight of the weight of the ingredients.
References Cited (Backward Citations)
US1972718A
Cited
US2007407A
Cited
US3545448A
Cited
US3608566A
Cited
GB1299296A
Cited
UST912011I4
Cited
US3931824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |