US4044777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic smoking product
Assignee: Gallaher Ltd
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Filing: 1975-12-01
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Granted: 1977-08-30
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Expires: 1995-12-01
Abstract
Abstract The invention relates to a fuel for use in a smoking product and consisting of a fibrous flexible self coherent carbonaceous material the fibers of which preferably have certain dimensions and are agglomerated into clusters of certain dimensions. Volatile constituents to give smoking satisfaction are added to the fuel and are distilled or sublimed into a smoke stream upon burning of the fuel.
Inventors
- 👤 Dennis Boyd
- 👤 George Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:10
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
The method of preparing a fuel for smoking by human beings which comprises the steps of agglomerating a plurality of flexible cellulose-base fibres containing only carbon, hydrogen and oxygen, into a coherent mass, and subjecting said mass to a controlled pyrolysis until said fibres have suffered a weight loss of at least 60% during the pyrolysis, having a cross-sectional dimension between 5 and 10 microns and an organic content which is at least 90% carbon by weight.
Claim 2
Independent Claim
77 words
The method of preparing a fuel for smoking by human beings which comprises the steps of agglomerating a plurality of flexible cellulose-base fibres containing only carbon, hydrogen and oxygen, into a coherent mass, and subjecting said mass to a controlled pyrolysis until said fibres have suffered a weight loss of at least 60% during the pyrolysis, having a cross-sectional dimension between 5 and 10 microns and an organic content which is at least 90% carbon by weight.
Claim 3
Dependent Claim
45 words
The method claimed in claim 1, which comprises the additional step of impregnating said pyrolized mass with at least one volatile substance capable of distilling or subliming without chemical change while avoiding impregnation with any substance which will change chemically when it distills or sublimes.
Claim 4
Dependent Claim
28 words
The method claimed in claim 2, in which said voltatile substance is selected from the group consisting of pharmacologically or physiologically active substances, smoke-producing substances, and flavour-imparting substances.
Claim 5
Dependent Claim
13 words
The method claimed in claim 1, in which said cellulose-based fibre is viscose.
Claim 6
Dependent Claim
18 words
The method claimed in claim 2, which comprises the step of impregnating said pyrolized mass with a glow-retardant.
Claim 7
Dependent Claim
13 words
The method claimed in claim 1 in which said fibres are non-adhesively agglomerated.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |