US4450847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapper for smoking articles and method
Assignee: Rf & Son Inc
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Filing: 1982-04-07
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Granted: 1984-05-29
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Expires: 2002-04-07
Abstract
Abstract A wrapper for smoking articles such as cigarettes, cigars and the like containing precipitated amorphous magnesium hydroxide gel. Other components of the filler for the wrapper can be either an unreactive grade of magnesium oxide or calcium carbonate. For the most effective reduction in sidestream tar and visible sidestream smoke the basis weight of the paper should be between 30 g/M2 and 100 g/M2. The filler should constitute 30% to 60% of the total sheet weight. The precipitated magnesium hydroxide gel should be present to the extent of approximately 5% to 50% by weight of the total filler and preferably between 10% and 25%.
Inventors
- 👤 William F. Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:46
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16; A; A24; A24D; A24D1/00; A24D1/02; D21H17/00; D21H17/63; D21H17/70; D21H17/67; D21H17/675
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
58 words
A wrapper for smoking articles such as cigarettes, cigars and the like comprising a cellulosic sheet containing, as filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated on or applied to the fibers of the sheet wherein the small fraction of amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 2
Dependent Claim
58 words
A wrapper for smoking articles such as cigarettes, cigars and the like comprising a cellulosic sheet containing, as filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated on or applied to the fibers of the sheet wherein the small fraction of amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 3
Dependent Claim
23 words
The wrapper as defined in claim 1 wherein the filler further contains an unreactive grade of magnesium oxide or calcium carbonate or both.
Claim 4
Dependent Claim
24 words
The wrapper as defined in claim 2 wherein the precipitated amorphous magnesium hydroxide gel comprises 10% to 25% by weight of the total filler.
Claim 5
Dependent Claim
71 words
The wrapper as defined in claim 1 wherein the filler further contains an unreactive grade of magnesium oxide or calcium carbonate or both; the basis weight of the sheet is between 30 g/M 2 and 100 g/M 2 , the filler constitutes 30% to 60% of the total sheet weight and the precipitated magnesium hydroxide is present to the extent of approximately 5% to 50% by weight of the total filler.
Claim 6
Dependent Claim
13 words
The wrapper of claim 1 in which the cellulosic sheet is cigarette paper.
Claim 7
Dependent Claim
13 words
The wrapper of claim 1 in which the cellulosic sheet is cigar wrap.
Claim 8
Dependent Claim
19 words
The wrapper of claim 1 further including 2% to 8% by weight of potassium acetate as a chemical adjuvant.
Claim 9
Dependent Claim
72 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a cellulosic sheet containing, as a filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated on or applied to the fibers of the sheet, whereby upon burning the smoking article visible sidestream smoke is reduced, wherein the precipitated amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 10
Dependent Claim
72 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a cellulosic sheet containing, as a filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated on or applied to the fibers of the sheet, whereby upon burning the smoking article visible sidestream smoke is reduced, wherein the precipitated amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 11
Dependent Claim
24 words
The smoking article as defined in claim 8 wherein the filler further contains an unreactive grade of magnesium oxide or calcium carbonate or both.
Claim 12
Dependent Claim
25 words
The smoking article as defined in claim 9 wherein the precipitated amorphous magnesium hydroxide gel comprise 10% to 25% by weight of the total filler.
Claim 13
Dependent Claim
41 words
The smoking article as defined in claim 8 wherein the filler further contains an unreactive grade of magnesium oxide or calcium carbonate, or both, and the basis weight of the sheet is between 30 g/M 2 and 100 g/M 2 .
Claim 14
Dependent Claim
24 words
The smoking article defined in claim 8 further including 2% to 8% by weight of potassium acetate in the wrapper as a chemical adjuvant.
Claim 15
Independent Claim
67 words
A method for reducing the visible sidestream smoke emanated from a smoking article comprising wrapping the tobacco charge in the smoking article in a combustible cellulosic sheet containing, as a filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated or applied to the fibers of the sheet, wherein the precipitated amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 16
Independent Claim
67 words
A method for reducing the visible sidestream smoke emanated from a smoking article comprising wrapping the tobacco charge in the smoking article in a combustible cellulosic sheet containing, as a filler, a small fraction of freshly precipitated amorphous magnesium hydroxide gel coated or applied to the fibers of the sheet, wherein the precipitated amorphous magnesium hydroxide gel comprises 5% to 50% by weight of the total filler.
Claim 17
Dependent Claim
23 words
The method as defined in claim 13 wherein the filler further contains an unreactive grade of magnesium oxide or calcium carbonate or both.
Claim 18
Dependent Claim
24 words
The method as defined in claim 14 wherein the precipitated amorphous magnesium hydroxide gel comprises 10% to 25% by weight of the total filler.
Claim 19
Dependent Claim
27 words
The method as defined in claim 14 further including adding to or forming on the fibers of the sheet 2% to 8% by weight of potassium acetate.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |