Patent US3987802A successfully refreshed from Google Patents.
US3987802A
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Chitin as an extender and filter for tobacco
Assignee: University of Delaware
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Filing: 1975-03-05
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Granted: 1976-10-26
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Expires: 1995-03-05
Abstract
Abstract Chitin, either as such or in toasted form, has been found to be an effective extender and filter for tobacco. It can be used in substantial amounts with tobacco blends without adversely affecting such physical properties as packing ability, burning rate or retention of ash. Organoleptic properties such as aroma, taste and smoothness are little affected. To the degree that chitin is used in the mixture, nicotine and noxious tars are reduced. Mixtures of chitin and tobacco represent new compositions.
Inventors
- 👤 Paul Rolland Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:16
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/10; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/18; A24B15/28; A24B15/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
A tobacco mixture containing chitin, which is insoluble in dilute acetic acid, as an extender.
Claim 2
Dependent Claim
15 words
A tobacco mixture containing chitin, which is insoluble in dilute acetic acid, as an extender.
Claim 3
Dependent Claim
21 words
The tobacco mixture of claim 1 wherein the chitin is present in an amount of at least 5% of the tobacco.
Claim 4
Dependent Claim
22 words
The tobacco mixture of claim 1 wherein the chitin is present in an amount of 5 to 75% of the tobacco mixture.
Claim 5
Dependent Claim
12 words
The tobacco mixture of claim 1 wherein the chitin is toasted chitin.
Claim 6
Dependent Claim
44 words
In a cigarette having a main body portion and a tip filter portion distinct from the main body portion, the improvement which comprises incorporating in the filtering medium of the tip filter portion at least 5% chitin which is insoluble in dilute acetic acid.
Claim 7
Dependent Claim
44 words
In a cigarette having a main body portion and a tip filter portion distinct from the main body portion, the improvement which comprises incorporating in the filtering medium of the tip filter portion at least 5% chitin which is insoluble in dilute acetic acid.
Claim 8
Dependent Claim
25 words
The cigarette of claim 5 wherein the filtering medium consists of a mixture of tobacco and said chitin which is insoluble in dilute acetic acid.
Claim 9
Dependent Claim
21 words
The cigarette of claim 5 wherein the filtering medium consists essentially of said chitin which is insoluble in dilute acetic acid.
References Cited (Backward Citations)
CA628238A
Cited
US3421519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |