US4033359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking mixture
Assignee: Imperial Group PLC
•
Filing: 1974-03-05
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Granted: 1977-07-05
•
Expires: 1994-03-05
Abstract
Abstract Tobacco based smoking mixture containing a minimum amount of tobacco and a maximum amount of harmless inorganic filler, the composition of the filler having been selected so as to impart a commercially acceptable burning rate to the mixture.
Inventors
- 👤 James Borthwick
- 👤 James Forrester Morman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/12; A24B15/14; A24B15/18; A24B15/28; A24B15/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
A smoking mixture in fabricated form comprising (a) 15-60% by weight of tobacco, based on the weight of said mixture, (b) binder in amount sufficient to fabricate this mixture into the desired form, and (c) from 40 to 65% by weight of a harmless filler, the combination of cations and anions in the filler being such that the smoking mixture has a puff number of 10-12, determined by subjecting a 1.1 g cigarette 70 mm long and 25 mm in circumference to a smoking procedure with puffs of 25 ml in 2 seconds followed by a 58 second rest period and the cigarette smoked down to a butt length of 20 mm, the anion of the filler being formate, oxalate, citrate, tartrate, silicate, carbonate, chloride, sulphate, phosphate, borate, oxide, dioxide or aluminate and the cation of the filler being sodium, potassium, calcium, magnesium, iron or titanium.
Claim 2
Dependent Claim
146 words
A smoking mixture in fabricated form comprising (a) 15-60% by weight of tobacco, based on the weight of said mixture, (b) binder in amount sufficient to fabricate this mixture into the desired form, and (c) from 40 to 65% by weight of a harmless filler, the combination of cations and anions in the filler being such that the smoking mixture has a puff number of 10-12, determined by subjecting a 1.1 g cigarette 70 mm long and 25 mm in circumference to a smoking procedure with puffs of 25 ml in 2 seconds followed by a 58 second rest period and the cigarette smoked down to a butt length of 20 mm, the anion of the filler being formate, oxalate, citrate, tartrate, silicate, carbonate, chloride, sulphate, phosphate, borate, oxide, dioxide or aluminate and the cation of the filler being sodium, potassium, calcium, magnesium, iron or titanium.
Claim 3
Dependent Claim
21 words
A smoking mixture as claimed in claim 1 wherein the tobacco content of the mixture is 20 to 30% by weight.
Claim 4
Dependent Claim
22 words
A smoking mixture as claimed in claim 1 wherein the harmless filler comprises 40 to 60% by weight of the smoking mixture.
Claim 5
Dependent Claim
46 words
A smoking mixture as claimed in claim 1 wherein the filler comprises a mixture of two or more inorganic salts admixed in quantities such as to obtain the balance of anions and cations most appropriate for imparting an acceptable rate of combustion to the smoking mixture.
Claim 6
Dependent Claim
33 words
A smoking mixture as claimed in claim 1 wherein the filler comprises a single inorganic salt present in an amount such as to obtain an acceptable rate of combustion for the smoking mixture.
Claim 7
Dependent Claim
18 words
A smoking mixture as claimed in claim 1 wherein the filler comprises a salt of an organic acid.
Claim 8
Dependent Claim
16 words
A smoking mixture as claimed in claim 1 comprising a plasticiser/humectant in addition to the binder.
Claim 9
Dependent Claim
18 words
A smoking mixture as claimed in claim 7 wherein the plasticiser/humectant comprises glycerol, ethylene glycol or polyethylene glycol.
Claim 10
Dependent Claim
36 words
A smoking mixture as claimed in claim 1 wherein the binder is selected from the group consisting of carboxymethyl cellulose and its salts, other carboxylated carbohydrates, natural gum, guar gum, locust bean gum and cellulose ethers.
Claim 11
Dependent Claim
16 words
A smoking mixture as claimed in claim 1 comprising, medicaments, flavourants, drugs and other known additives.
Claim 12
Dependent Claim
40 words
A smoking mixture as claimed in claim 1 wherein the inorganic filler comprises calcium carbonate, calcium borate, sodium borate, calcium orthophosphate, magnesium carbonate, calcium sulphate, calcium oxalate, iron sulphate, titanium dioxide, magnesium aluminate or sodium aluminium silicate or mixtures thereof.
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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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |