US4256123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smokable material containing thermally degraded tobacco by-products and its method of preparation
Assignee: Philip Morris USA Inc
•
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 containing tobacco by-products, such as stems or stalks, having reduced particulate matter, particularly, tar and nicotine, and which additionally has no undesirable "woody taste" is disclosed. The method for producing this smokable material comprises subjecting tobacco by-products material to pyrolysis, adding the pyrolyzed material to a tobacco-parts slurry, homogenizing the slurry, drying and processing the resultant reconstituted product to a form desired for the smoking material. The smoking material obtained by such method is also described.
Inventors
- 👤 Andrew T. Lendvay
- 👤 Helmut R. R. Wakeham
- 👤 Gus D. Keritsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
49 words
A method of producing a smokable material comprising: (a) subjecting a material consisting essentially of tobacco by-products to uncatalyzed pyrolysis to produce a weight loss of about 40 to 90%; (b) adding the pyrolyzed material to a slurry consisting essentially of tobacco-parts; (c) homogenizing the slurry; and (d) drying.
Claim 2
Independent Claim
49 words
A method of producing a smokable material comprising: (a) subjecting a material consisting essentially of tobacco by-products to uncatalyzed pyrolysis to produce a weight loss of about 40 to 90%; (b) adding the pyrolyzed material to a slurry consisting essentially of tobacco-parts; (c) homogenizing the slurry; and (d) drying.
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein the tobacco by-product material is selected from the group consisting of tobacco stems, stalks, dust, fines and blends thereof.
Claim 4
Dependent Claim
33 words
The method of claim 1, wherein the pyrolysis is carried out at a temperature of about 150° C. for about 72 hours to a temperature of about 700° C. for about 30 seconds.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein the heating source for the pyrolysis step is derived from radiant heat, gas heat, oil heat, steam, electricity or microwave energy.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein the pyrolysis is carried out in an inert atmosphere.
Claim 7
Dependent Claim
19 words
The method of claim 5, wherein the inert atmosphere is comprised of nitrogen, carbon dioxide, helium, or a vacuum.
Claim 8
Dependent Claim
23 words
The method of claim 1, wherein prior to step (a), the tobacco by-product material is water extracted to remove water soluble constituents therefrom.
Claim 9
Dependent Claim
10 words
The method of claim 7, wherein potassium salts are removed.
Claim 10
Dependent Claim
28 words
The method of claim 1, wherein during the pyrolysis of the tobacco by-product material, volatile organic materials produced as a result of the pyrolysis are removed by vacuum.
Claim 11
Dependent Claim
23 words
The method of claim 1, wherein subsequent to step (a) and prior to step (b), the pyrolyzed tobacco by-product material is immediately cooled.
Claim 12
Dependent Claim
22 words
The method of claim 1, wherein prior to adding the pyrolyzed material to the tobacco parts slurry, the said material is pulverized.
Claim 13
Dependent Claim
20 words
The method of claim 11, wherein the pyrolyzed tobacco by-product material is pulverized by means of dry or wet grinding.
Claim 14
Dependent Claim
26 words
The method of claim 1, wherein up to 75% on a dry weight basis of the pyrolyzed tobacco by-product material is added to the tobacco-parts slurry.
Claim 15
Dependent Claim
26 words
The method of claim 1, where in step (d), the homogenized slurry is formed into a sheet by means of a paper-making process, dried and shredded.
Claim 16
Dependent Claim
20 words
The method of claim 1, where in step (d), the homogenized slurry is cast into a sheet, dried and shredded.
Claim 17
Dependent Claim
16 words
The method of claim 14, wherein the shredded smoking material is combined with natural leaf tobacco.
Claim 18
Dependent Claim
16 words
The method of claim 15, wherein the shredded smoking material is combined with natural leaf tobacco.
Claim 19
Independent Claim
82 words
A method of producing a smokable material comprising: (a) water extracting tobacco by-product material to remove water soluble constituents therefrom; (b) pyrolyzing the water extracted tobacco by-product material to a weight loss of about 40 to 90%; (c) pulverizing the pyrolyzed tobacco by-product material; (d) adding about 0.08 to 60% on a dry weight basis of the pulverized material to a tobacco-parts slurry; (e) homogenizing the slurry; and (f) processing the slurry into sheet form and drying and shredding the resultant product.
Claim 20
Independent Claim
82 words
A method of producing a smokable material comprising: (a) water extracting tobacco by-product material to remove water soluble constituents therefrom; (b) pyrolyzing the water extracted tobacco by-product material to a weight loss of about 40 to 90%; (c) pulverizing the pyrolyzed tobacco by-product material; (d) adding about 0.08 to 60% on a dry weight basis of the pulverized material to a tobacco-parts slurry; (e) homogenizing the slurry; and (f) processing the slurry into sheet form and drying and shredding the resultant product.
Claim 21
Dependent Claim
21 words
A smokable material comprising tobacco by-product material pyrolyzed to a weight loss of about 40 to 90% homogenized with reconstituted tobacco.
Claim 22
Dependent Claim
21 words
A smokable material comprising tobacco by-product material pyrolyzed to a weight loss of about 40 to 90% homogenized with reconstituted tobacco.
Claim 23
Dependent Claim
25 words
The material of claim 19, wherein the tobacco by-product material is selected from the group consisting of tobacco stems, stalks, dust, fines and blends thereof.
Claim 24
Dependent Claim
16 words
The material of claim 19, wherein the pyrolyzed tobacco by-product is substantially devoid of potassium salts.
Claim 25
Dependent Claim
19 words
The material of claim 19 containing up to 75% on a dry weight basis of pyrolyzed tobacco by-product materials.
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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 |