US4480650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated self-extinguished cigarette
Assignee: Individual
•
Filing: 1982-03-02
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Granted: 1984-11-06
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Expires: 2002-03-02
Abstract
Abstract Cigarette coating comprises a fireproof coating made from clay or ceramic applied on the inside of the cigarette paper divided in sections to prevent glowing tobacco from penetrating to the outside but allows air circulation through cracks created when heat makes contact with the coating.
Inventors
- 👤 Friedrich Weinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16; A; A24; A24D; A24D1/00; A24D1/02; A24D1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A cigarette comprising a charge of tobacco wrapped in a cigarette paper wherein the wrapper is coated on its inner portion that contacts said tobacco with a fire proofing clay in an effective amount so that upon the burning of the cigarette the clay becomes brittle and cracks allowing air to penetrate into the combustion zone but physically segregating the combustion zone from its ambient surroundings and wherein said clay coating is divided into annular sections so that when the cigarette is smoked the separate clay sections will individually fall off.
Claim 2
Dependent Claim
91 words
A cigarette comprising a charge of tobacco wrapped in a cigarette paper wherein the wrapper is coated on its inner portion that contacts said tobacco with a fire proofing clay in an effective amount so that upon the burning of the cigarette the clay becomes brittle and cracks allowing air to penetrate into the combustion zone but physically segregating the combustion zone from its ambient surroundings and wherein said clay coating is divided into annular sections so that when the cigarette is smoked the separate clay sections will individually fall off.
References Cited (Backward Citations)
GB863398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |