Patent US4231377A successfully refreshed from Google Patents.
US4231377A
Expired / Lapsed
US
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Wrapper for smoking articles containing magnesium oxide
Assignee: Magnera Corp
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Filing: 1978-08-30
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Granted: 1980-11-04
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Expires: 1998-08-30
Abstract
Abstract A wrapper for smoking articles such as cigarettes, cigars and the like containing at least 15% by weight magnesium oxide or its hydrate and at least 0.5% by weight of a specific chemical adjuvant such as the alkali metal acetates, carbonates, citrates, nitrates or tartrates. The combination of magnesium oxide or its hydrate with any of the chemical adjuvants significantly reduces visible sidestream smoke that emanates during static burning from smoking articles employing the wrapper. The wrapper may comprise conventional cigarette paper with magnesium oxide and the adjuvant incorporated therein as the filler in the paper furnish or either or both of the additives may be applied to the paper as a coating. Wrappers containing the additives can be used in place of conventional wrappers for smoking articles or used as an inner wrapper for the tobacco column in combination with a conventional outer wrapping of cigarette paper or cigar wrap.
Inventors
- 👤 Warren K. Cline
- 👤 Richard H. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:12
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
56 words
A wrapper for the tobacco charge in a smoking article comprising a combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates, both percentages by weight based upon the weight of the wrapper.
Claim 2
Dependent Claim
56 words
A wrapper for the tobacco charge in a smoking article comprising a combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates, both percentages by weight based upon the weight of the wrapper.
Claim 3
Dependent Claim
13 words
The wrapper of claim 1 in which the cellulosic sheet is cigarette paper.
Claim 4
Dependent Claim
13 words
The wrapper of claim 1 in which the cellulosic sheet is cigar wrap.
Claim 5
Dependent Claim
14 words
The wrapper of claim 1 in which the salt is sodium or potassium acetate.
Claim 6
Dependent Claim
14 words
The wrapper of claim 1 in which the salt is sodium or potassium carbonate.
Claim 7
Dependent Claim
14 words
The wrapper of claim 1 in which the salt is sodium or potassium citrate.
Claim 8
Dependent Claim
14 words
The wrapper of claim 1 in which the salt is sodium or potassium nitrate.
Claim 9
Dependent Claim
14 words
The wrapper of claim 1 in which the salt is sodium or potassium tartrate.
Claim 10
Dependent Claim
21 words
The wrapper of claim 1 in which the cellulosic sheet contains at least 35% magnesium oxide and at least 2.0% salt.
Claim 11
Dependent Claim
19 words
The wrapper of claim 1 in which the basis weight of the sheet is 50 g/m 2 or greater.
Claim 12
Dependent Claim
91 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates, both percentages by weight based on the weight of the sheet, whereby upon burning the smoking article visible sidestream smoke is substantially reduced as compared to smoking articles of the same composition employing a conventional wrapper for the tobacco charge.
Claim 13
Dependent Claim
91 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates, both percentages by weight based on the weight of the sheet, whereby upon burning the smoking article visible sidestream smoke is substantially reduced as compared to smoking articles of the same composition employing a conventional wrapper for the tobacco charge.
Claim 14
Dependent Claim
34 words
The smoking article of claim 11 in which the article is a cigarette and the sheet is used as an inner wrapper for the tobacco charge under an outer wrapper of conventional cigarette paper.
Claim 15
Dependent Claim
21 words
The smoking article of claim 11 in which the sheet contains at least 35% magnesium oxide and at least 2.0% salt.
Claim 16
Dependent Claim
15 words
The smoking article of claim 11 in which the salt is sodium or potassium acetate.
Claim 17
Dependent Claim
15 words
The smoking article of claim 11 in which the salt is sodium or potassium carbonate.
Claim 18
Dependent Claim
15 words
The smoking article of claim 11 in which the salt is sodium or potassium citrate.
Claim 19
Dependent Claim
15 words
The smoking article of claim 11 in which the salt is sodium or potassium nitrate.
Claim 20
Dependent Claim
15 words
The smoking article of claim 11 in which the salt is sodium or potassium tartrate.
Claim 21
Independent Claim
57 words
A method for reducing the visible sidestream smoke emanated from a smoking article comprising wrapping the tobacco charge in the smoking article in the combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates.
Claim 22
Independent Claim
57 words
A method for reducing the visible sidestream smoke emanated from a smoking article comprising wrapping the tobacco charge in the smoking article in the combustible cellulosic sheet containing at least 15% magnesium oxide and at least 0.5% of a chemical adjuvant salt selected from the group consisting of the alkali metal acetates, carbonates, citrates, nitrates and tartrates.
Claim 23
Dependent Claim
19 words
The method of claim 19 in which the basis weight of the sheet is 50 g/m 2 or greater.
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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |