US4510950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed, extruded, tobacco-containing smoking article and method of making same
Assignee: Philip Morris USA Inc
•
Filing: 1982-12-30
•
Granted: 1985-04-16
•
Expires: 2002-12-30
Abstract
Abstract A substantially cylindrical foamed, extruded, tobacco-containing smoking article is provided which has properties substantially equivalent to those of a conventional cigarette and which contains from about 5 to about 98 wt. % of tobacco particles having a particle size of up to about 5 mesh, from 0 to about 60 wt. % of a filler having a particle size of up to about 350 mu m mesh, from about 2 to about 40 wt. % of a cellulosic binder selected from the group consisting of hydroxypropyl cellulose, carboxymethyl cellulose, and its sodium, potassium and ammonium salts, cross-linked carboxymethyl cellulose, and its sodium, potassium and ammonium salts, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, ethyl cellulose, and mixtures thereof, and from about 5 to about 20 wt. % water. The article has a density within the range of from about 0.05 to about 1.5 g/cc. The method of making such articles comprises the steps of (a) dry blending from about 5 to about 98 wt. % of the tobacco particles having an OV value of from about 3 to about 20%, with from 0 to about 60 wt. % of a filler and having a particle size of up to about 5 mesh, and from about 4 to about 40 wt. % of the cellulosic binder; then (b) admixing this dry blend with water to form a wet blend containing from about 15 to about 50 wt. % of water; then (c) extruding the wet blend under extrusion conditions of temperature and pressure such that as the wet blend is extruded the moisture in the blend is converted to steam thereby foaming the article.
Inventors
- 👤 Gus D. Keritsis
- 👤 Walter A. Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:59
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/12; A24B15/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
185 words
A method of making a foamed, extruded, tobacco-containing smoking article, comprising the steps of: (a) dry blending from about 5 to about 98 wt. % of tobacco particles having a particle size of up to about 5 mesh and an OV value of from about 3 to about 20%, with from 0 to about 60 wt. % of a filler having a particle size of up to about 350 μm, and from about 2 to about 40 wt. % of a cellulosic binder selected from the group consisting of hydroxypropyl cellulose, carboxymethyl cellulose, and its sodium, potassium and ammonium salts, cross-linked carboxymethyl cellulose, and its sodium, potassium and ammonium salts, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, ethyl cellulose, and mixtures thereof; (b) admixing the dry blend with water to form a wet blend containing from about 15 to about 50 wt. % of water; then (c) extruding the wet blend from step (b) under extrusion conditions of temperature and pressure such that as the wet blend is extruded the moisture in said blend is converted to steam, thereby foaming the article.
Claim 2
Independent Claim
185 words
A method of making a foamed, extruded, tobacco-containing smoking article, comprising the steps of: (a) dry blending from about 5 to about 98 wt. % of tobacco particles having a particle size of up to about 5 mesh and an OV value of from about 3 to about 20%, with from 0 to about 60 wt. % of a filler having a particle size of up to about 350 μm, and from about 2 to about 40 wt. % of a cellulosic binder selected from the group consisting of hydroxypropyl cellulose, carboxymethyl cellulose, and its sodium, potassium and ammonium salts, cross-linked carboxymethyl cellulose, and its sodium, potassium and ammonium salts, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, ethyl cellulose, and mixtures thereof; (b) admixing the dry blend with water to form a wet blend containing from about 15 to about 50 wt. % of water; then (c) extruding the wet blend from step (b) under extrusion conditions of temperature and pressure such that as the wet blend is extruded the moisture in said blend is converted to steam, thereby foaming the article.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the filler is selected from the group consisting of calcium carbonate, magnesium carbonate, calcium oxide, magnesium oxide, calcium hydroxide, magnesium hydroxide, alumina, hydrated alumina, clay, silica and mixtures thereof.
Claim 4
Dependent Claim
78 words
The method of claim 1 including adding in step (a) a compound selected from the group consisting of pectin and its sodium, potassium and ammonium salts, guar, carageenan, oxycellulose, polyvinyl alcohol, vinyl maleic anhydride polymer, vinyl maleic acid polymer and its sodium, potassium, and ammonium salts, microcrystalline cellulose, fibrous cellulose and mixtures thereof, such that the total amount of the compound and the cellulosic binder is within the range of from about 2 to about 40 wt. %.
Claim 5
Dependent Claim
33 words
The method of claim 1 including as a further step: (d) sizing the extrudate from step (c) to a substantially cylindrical shape having a diameter of from about 2 to about 35 mm.
Claim 6
Dependent Claim
21 words
The method of claim 1 including, in step (a), from about 0.1 to about 15 wt. % of a polyfunctional acid.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein the polyfunctional acid is citric acid.
Claim 8
Dependent Claim
39 words
The method of claim 1 including, in step (a), from about 0.1 to about 40 wt. % of a stiffening agent selected from the group consisting of alginic acid, pectinic acid, chitosan, their water soluble salts, and mixtures thereof.
Claim 9
Dependent Claim
33 words
The method of claim 1 including, in step (a), from about 2 to about 40 wt. % of an alcohol selected from the group consisting of ethanol, methanol, isopropanol, n-propanol, and mixtures thereof.
Claim 10
Dependent Claim
21 words
The method of claim 1 wherein in step (a) the tobacco particles comprise from about 50 to about 98 wt. %.
Claim 11
Dependent Claim
11 words
A smoking article produced according to the method of claim 1.
Claim 12
Dependent Claim
130 words
A substantially cylindrical, foamed, extruded, tobacco-containing smoking article comprising from about 5 to about 98 wt. % of tobacco particles having a particle size of up to about 5 mesh, from 0 to about 60 wt. % of a filler having a particle size of up to about 350 μm, from about 2 to about 40 wt. % of a cellulosic binder selected from the group consisting of hydroxypropyl cellulose, carboxymethyl cellulose, and its sodium, potassium and ammonium salts, cross-linked carboxymethyl cellulose, and its sodium, potassium and ammonium salts, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, ethyl cellulose, and mixtures thereof, and from about 5 to about 20 wt. % water, said article having a density within the range of from about 0.05 to about 1.5 g/cc.
Claim 13
Dependent Claim
130 words
A substantially cylindrical, foamed, extruded, tobacco-containing smoking article comprising from about 5 to about 98 wt. % of tobacco particles having a particle size of up to about 5 mesh, from 0 to about 60 wt. % of a filler having a particle size of up to about 350 μm, from about 2 to about 40 wt. % of a cellulosic binder selected from the group consisting of hydroxypropyl cellulose, carboxymethyl cellulose, and its sodium, potassium and ammonium salts, cross-linked carboxymethyl cellulose, and its sodium, potassium and ammonium salts, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, ethyl cellulose, and mixtures thereof, and from about 5 to about 20 wt. % water, said article having a density within the range of from about 0.05 to about 1.5 g/cc.
Claim 14
Dependent Claim
36 words
The smoking article of claim 11 wherein the filler is selected from the group consisting of calcium carbonate, magnesium carbonate, calcium oxide, magnesium oxide, calcium hydroxide, magnesium hydroxide, alumina, hydrated alumina, clay, silica and mixtures thereof.
Claim 15
Dependent Claim
75 words
The smoking article of claim 11 including a compound selected from the group consisting of pectin and its sodium, potassium and ammonium salts, guar, carageenan, oxycellulose, polyvinyl alcohol, vinyl maleic anhydride polymer, vinyl maleic acid polymer and its sodium, potassium, and ammonium salts, microcrystalline cellulose, fibrous cellulose and mixtures thereof, such that the total amount of the compound and the cellulosic binder is within the range of from about 2 to about 40 wt. %.
Claim 16
Dependent Claim
19 words
The smoking article of claim 11 including from about 0.1 to about 15 wt. % of a polyfunctional acid.
Claim 17
Dependent Claim
13 words
The smoking article of claim 14 wherein the polyfunctional acid is citric acid.
Claim 18
Dependent Claim
21 words
The smoking article of claim 11 wherein the tobacco particles comprise about 50 to about 98 wt. % of the article.
Claim 19
Dependent Claim
20 words
The smoking article of claim 11 including from about 0.1 to about 40 wt. % of a cross-linked stiffening agent.
References Cited (Backward Citations)
US235886A
Cited
GB282369A
Cited
US2433877A
Cited
US2485670A
Cited
US2445338A
Cited
US2598680A
Cited
CH275420A
Cited
US2592553A
Cited
DE1167717B
Cited
US3085580A
Cited
US3098492A
Cited
US3209763A
Cited
US3364935A
Cited
US3203432A
Cited
US3223090A
Cited
US3373751A
Cited
US3353541A
Cited
US3404691A
Cited
US3410279A
Cited
US3528434A
Cited
US3529602A
Cited
US3820548A
Cited
US3894544A
Cited
US3932081A
Cited
US3931824A
Cited
US4233993A
Cited
US4333484A
Cited
GB2064296A
Cited
US4340072A
Cited
US4391285A
Cited
US4347855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |