US3894543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking mixture
Assignee: Imperial Group PLC
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Filing: 1974-06-24
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Granted: 1975-07-15
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Expires: 1994-06-24
Abstract
Abstract A smoking mixture comprising a tobacco substitute in admixture with a solid residue obtained by removal of nicotine from Nicotiana Rustica or with a solvent extract of such a residue.
Inventors
- 👤 Robert Craig Anderson
- 👤 Donald Calder
- 👤 John Cormack Lovie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/18; A24B15/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A SMOKING MIXTURE COMPRISING A TOBACCO SUBSTITUTE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ETHERS, AND THERMALLY DEGRADED CARBOHYDRATES IN ADMIXTURE WITH AN ADDITIVE WHICH ENHANCES THE TOBACCO-LIKE FLAVOR OF SAID SUBSTITUTE, SAID ADDITIVE BEING EITHER A SOLID RESIDUE OBTAINED BY REMOVAL OF NICOTINE FROM NICOTIANA RUSTICA OR A SOLVENT EXTRACT OF SUCH A RESIDUE FROM WHICH ANY TOXIC SOLVENT IS TOTALLY REMOVED, SAID SOLID RESIDUE BEING OBTAINED BY TREATING NICOTIANA WITH ALKALI FOLLOWED BY STEAM DISTILLATION OR LEACHING WITH WATER TO REMOVE THE NICOTINE.
Claim 2
Dependent Claim
85 words
A SMOKING MIXTURE COMPRISING A TOBACCO SUBSTITUTE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ETHERS, AND THERMALLY DEGRADED CARBOHYDRATES IN ADMIXTURE WITH AN ADDITIVE WHICH ENHANCES THE TOBACCO-LIKE FLAVOR OF SAID SUBSTITUTE, SAID ADDITIVE BEING EITHER A SOLID RESIDUE OBTAINED BY REMOVAL OF NICOTINE FROM NICOTIANA RUSTICA OR A SOLVENT EXTRACT OF SUCH A RESIDUE FROM WHICH ANY TOXIC SOLVENT IS TOTALLY REMOVED, SAID SOLID RESIDUE BEING OBTAINED BY TREATING NICOTIANA WITH ALKALI FOLLOWED BY STEAM DISTILLATION OR LEACHING WITH WATER TO REMOVE THE NICOTINE.
Claim 3
Dependent Claim
16 words
A smoking mixture according to claim 1 wherein the tobacco substitute is a thermally degraded carbohydrate.
Claim 4
Dependent Claim
44 words
A smoking mixture according to claim 2 wherein the thermally degraded carbohydrate has been obtained by subjecting carbohydrate to a catalysed degradation process at above 100*C until the weight of degraded carbohydrate is less than 90 percent of the weight of the original carbohydrate.
Claim 5
Dependent Claim
16 words
A smoking mixture according to claim 3 wherein the thermally degraded carbohydrate is thermally degraded cellulose.
Claim 6
Dependent Claim
13 words
A smoking mixture according to claim 1 wherein the tobacco substitute comprises cellulose.
Claim 7
Dependent Claim
17 words
A smoking mixture according to claim 1 wherein the tobacco substitute comprises a carboxymethylcellulose or salt thereof.
Claim 8
Dependent Claim
21 words
A smoking mixture according to claim 1 wherein the solid residue has been obtained by treatment with lime as the alkali.
Claim 9
Dependent Claim
26 words
A smoking mixture according to claim 1 comprising said solid residue in an amount of 1 to 60 percent by weight of the said tobacco substitute.
Claim 10
Dependent Claim
26 words
A smoking mixture according to claim 1 comprising said solid residue in an amount of 5 to 15 percent by weight of the said tobacco substitute.
Claim 11
Dependent Claim
31 words
A smoking mixture according to claim 1 comprising said solvent extract in an amount of 1 to 5 percent by weight of the said tobacco substitute, calculated on a solvent-free basis.
Claim 12
Dependent Claim
20 words
A smoking mixture according to claim 1 comprising fabricated into sheet or filamentary form with the aid of a binder.
Claim 13
Dependent Claim
17 words
A smoking mixture according to claim 11 wherein the binder is carboxymethyl cellulose or a salt thereof.
Claim 14
Dependent Claim
82 words
A process for the manufacture of a smoking mixture in sheet form comprising slurrying with water a tobacco substitute, a binder, a solid residue obtained by removal of nicotine from Nicotiana Rustica or a solvent extract of such a reside, together with any other ingredients, said solid residue being obtained by treating Nicotiana with alkali followed by steam distillation or leaching with water to remove the nicotine, casting the slurry on to a drying surface and then drying to form a sheet.
Claim 15
Dependent Claim
82 words
A process for the manufacture of a smoking mixture in sheet form comprising slurrying with water a tobacco substitute, a binder, a solid residue obtained by removal of nicotine from Nicotiana Rustica or a solvent extract of such a reside, together with any other ingredients, said solid residue being obtained by treating Nicotiana with alkali followed by steam distillation or leaching with water to remove the nicotine, casting the slurry on to a drying surface and then drying to form a sheet.
Claim 16
Dependent Claim
22 words
A smoking mixture according to claim 1 wherein the extract is obtained by extracting said solid residue with a low boiling alcohol.
References Cited (Backward Citations)
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Cited
US3046997A
Cited
US3461079A
Cited
US3545448A
Cited
US3638660A
Cited
US3529602A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |