US4256126A
Expired / Lapsed
US
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Smokable material and its method of preparation
Assignee: Philip Morris USA Inc
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Filing: 1978-08-02
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Granted: 1981-03-17
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Expires: 1998-08-02
Abstract
Abstract A method of producing a smokable material having reduced particulate matter, particularly tar, nicotine and puff count, while still maintaining the desirable characteristics of a smoking material is disclosed. The method comprises pyrolyzing a carbohydrate material to a weight loss of at least 10%, forming a slurry of tobacco-parts, adding the pyrolyzed carbohydrate material to the slurry, homogenizing the slurry and processing the resultant product to a form desired for the smoking material. The smokable material obtained by such method is also described.
Inventors
- 👤 Robert B. Seligman
- 👤 Gus D. Keritsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
106 words
A method of producing a smokable material which comprises: (a) pyrolyzing a carbohydrate material to a weight loss of at least 10%; (b) forming a slurry of tobacco-parts; (c) adding the pyrolyzed carbohydrate material to the slurry; (d) homogenizing the slurry; (e) adding an alkali metal salt selected from the group consisting of an alkali metal salt of a lower carboxylic acid, carbonate, bicarbonate, and phosphate to the homogenized slurry in an amount in the range of about 0.3 to 10% by weight based on the total dry weight of the slurry; and (f) processing the resultant product to a form desired for the smoking material.
Claim 2
Independent Claim
106 words
A method of producing a smokable material which comprises: (a) pyrolyzing a carbohydrate material to a weight loss of at least 10%; (b) forming a slurry of tobacco-parts; (c) adding the pyrolyzed carbohydrate material to the slurry; (d) homogenizing the slurry; (e) adding an alkali metal salt selected from the group consisting of an alkali metal salt of a lower carboxylic acid, carbonate, bicarbonate, and phosphate to the homogenized slurry in an amount in the range of about 0.3 to 10% by weight based on the total dry weight of the slurry; and (f) processing the resultant product to a form desired for the smoking material.
Claim 3
Dependent Claim
37 words
The method of claim 1, wherein the amount of alkali metal salt added to the homogenized slurry is in the range of about 1 to 6% by weight based on the total dry weight of the slurry.
Claim 4
Independent Claim
116 words
A method of producing a smokable material which comprises: (a) pyrolyzing a carbohydrate material to a weight loss of at least 10%; (b) forming a slurry of tobacco-parts; (c) adding the pyrolyzed carbohydrate material to the slurry; (d) homogenizing the slurry; (e) adding a lower carboxylic acid or derivative thereof selected from the group consisting of formic, acetic, propionic, butyric, valeric, methyl valeric, isovaleric, secbutyl malonic, isopropyl malonic, ethyl malonic, methyl malonic and dimethyl malonic acid to the homogenized slurry in an amount in the range of about 0.2 to 10% by weight based on the total dry weight of the slurry; and (f) processing the resultant product to a form desired for the smoking material.
Claim 5
Independent Claim
116 words
A method of producing a smokable material which comprises: (a) pyrolyzing a carbohydrate material to a weight loss of at least 10%; (b) forming a slurry of tobacco-parts; (c) adding the pyrolyzed carbohydrate material to the slurry; (d) homogenizing the slurry; (e) adding a lower carboxylic acid or derivative thereof selected from the group consisting of formic, acetic, propionic, butyric, valeric, methyl valeric, isovaleric, secbutyl malonic, isopropyl malonic, ethyl malonic, methyl malonic and dimethyl malonic acid to the homogenized slurry in an amount in the range of about 0.2 to 10% by weight based on the total dry weight of the slurry; and (f) processing the resultant product to a form desired for the smoking material.
Claim 6
Dependent Claim
34 words
The method of claim 3, wherein the amount of acid added to homogenized slurry is in the range of about 0.3 to 5% by weight based on the total dry weight of the slurry.
Claim 7
Independent Claim
42 words
The method of claims 1 or 4, wherein the carbohydrate material is selected from the group consisting of wood pulp, paper pulp, straw, flax, bamboo, esparto grass, kenaf fibers, cotton, hemp, rice fibers, vegetable fibers, coffee or peanut hulls and plant parts.
Claim 8
Independent Claim
22 words
The method of claims 1 or 4, wherein the carbohydrate material is pyrolyzed at a temperature of at least about 100° C.
Claim 9
Independent Claim
23 words
The method of claims 1 or 4, wherein the slurry of tobacco-parts is formed with an adhesive binder derived from natural tobacco parts.
Claim 10
Dependent Claim
12 words
The method of claim 7, wherein the binder is a pectin material.
Claim 11
Independent Claim
44 words
The method of claims 1 or 4, wherein the slurry of tobacco-parts is formed with an adhesive binder which is a modified cellulose or natural gum selected from the group consisting of carboxymethyl cellulose or its salts, guar gum, alginates and ethyl hydroxy-ethyl cellulose.
Claim 12
Independent Claim
26 words
The method of claims 1 or 4 which includes the step of pulverizing the pyrolyzed carbohydrate material prior to its being added to the tobacco-parts slurry.
Claim 13
Dependent Claim
19 words
The method of claim 10, wherein the pyrolyzed carbohydrate material is pulverized to less than about 450μ in diameter.
Claim 14
Independent Claim
27 words
The method of claims 1 or 4, wherein about 5 to 80% on a dry weight basis of the pyrolyzed carbohydrate material is added to the slurry.
Claim 15
Independent Claim
47 words
The method of claims 1 or 4, wherein the homogenization step is carried out such that about 2 to 5 gal/min of slurry is passed through a series of refiners maintained at a back pressure of about 60 psi such that a uniform homogeneous mixture is obtained.
Claim 16
Dependent Claim
24 words
The method of claim 1, wherein the carboxylic acid is selected from the group consisting of oxalic, acetic, citric, pivalic, malic and maleic acid.
Claim 17
Dependent Claim
19 words
The method of claim 4, wherein metallic or ammonium salts of these acids are added to the homogenized slurry.
Claim 18
Independent Claim
17 words
The method of claims 1 or 4, wherein natural leaf tobacco is added to the homogenized slurry.
Claim 19
Dependent Claim
51 words
A smokable material having reduced tar and nicotine comprising: (a) a pyrolyzed carbohydrate material homogenized with reconstituted tobacco; and (b) from about 0.3 to 10% by weight of an alkali metal salt selected from the group consisting of an alkali metal salt of a lower carboxylic acid, carbonate, bicarbonate and phosphate.
Claim 20
Dependent Claim
51 words
A smokable material having reduced tar and nicotine comprising: (a) a pyrolyzed carbohydrate material homogenized with reconstituted tobacco; and (b) from about 0.3 to 10% by weight of an alkali metal salt selected from the group consisting of an alkali metal salt of a lower carboxylic acid, carbonate, bicarbonate and phosphate.
Claim 21
Dependent Claim
25 words
The material of claim 17, wherein the amount of alkali metal salt present is in the range of from about 1 to 6% by weight.
Claim 22
Dependent Claim
57 words
A smokable material having reduced tar and nicotine comprising: (a) a pyrolyzed carbohydrate material homogenized with a reconstituted tobacco; and (b) from about 0.2 to 10% by weight of an acid selected from the group consisting of formic, acetic, propionic, butyric, valeric, methyl valeric, isovaleric, sec-butyl malonic, isopropyl malonic, ethyl malonic, methyl malonic and dimethyl malonic acid.
Claim 23
Dependent Claim
57 words
A smokable material having reduced tar and nicotine comprising: (a) a pyrolyzed carbohydrate material homogenized with a reconstituted tobacco; and (b) from about 0.2 to 10% by weight of an acid selected from the group consisting of formic, acetic, propionic, butyric, valeric, methyl valeric, isovaleric, sec-butyl malonic, isopropyl malonic, ethyl malonic, methyl malonic and dimethyl malonic acid.
Claim 24
Dependent Claim
23 words
The material of claim 19, wherein the amount of acid present is in the range of from about 0.3 to 5% by weight.
Claim 25
Dependent Claim
42 words
The material of claims 17 or 19, wherein the carbohydrate material is selected from the group consisting of wood pulp, paper pulp, straw, flax, bamboo, esparto grass, kenaf fibers, cotton, hemp, rice fibers, vegetable fibers, coffee or peanut hulls and plant parts.
Claim 26
Dependent Claim
22 words
The material of claims 17 or 19, wherein the pyrolyzed material has been pyrolyzed to a weight loss of at least 10%.
Claim 27
Dependent Claim
15 words
The material of claims 17 or 19, wherein a natural tobacco adhesive binder is present.
Claim 28
Dependent Claim
14 words
The material of claims 17 or 19, wherein the binder is a pectin material.
Claim 29
Dependent Claim
39 words
The material of claims 17 or 19, wherein an adhesive binder which is a modified cellulose or natural gum selected from the group consisting of carboxymethyl cellulose or its salts, guar gum, alginates and ethyl hydroxyethyl cellulose is present.
Claim 30
Dependent Claim
14 words
The material of claims 17 or 19, wherein the pyrolyzed carbohydrate material is pulverized.
Claim 31
Dependent Claim
16 words
The material of claim 24, wherein the pyrolyzed carbohydrate material is less than 450μ in diameter.
Claim 32
Dependent Claim
15 words
The material of claim 19 which further includes metallic or ammonium salts of these acids.
Claim 33
Dependent Claim
12 words
The material of claims 17 or 18 which further includes natural tobacco.
Claim 34
Dependent Claim
24 words
The material of claim 17, wherein the carboxylic acid is selected from the group consisting of oxalic, acetic, citric, pivalic, malic and maleic acid.
Claim 35
Dependent Claim
25 words
The material of claim 19, wherein the pyrolyzed carbohydrate material is present in the amount of about 5 to 80% on a dry weight basis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |