Patent US4727889A successfully refreshed from Google Patents.
US4727889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco processing
Assignee: RJ Reynolds Tobacco Co
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Filing: 1986-12-22
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Granted: 1988-03-01
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Expires: 2006-12-22
Abstract
Abstract Flue-cured tobacco can be treated with burley tobacco flavor components and subjected to volume expansion conditions. Flavor components are supercritically extracted from burley tobacco and directly applied to the flue-cured tobacco while the extraction fluid is in a supercritical or subcritical state.
Inventors
- 👤 Benjamin F. Niven, Jr.
- 👤 Charles D. Mays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:41
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/24; A24B15/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A process for providing a flavored smoking material, the process comprising: (a) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (b) contacting the extracted tobacco components within the fluid, while the fluid is in a supercritical or subcritical state, with a smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components.
Claim 2
Dependent Claim
73 words
A process for providing a flavored smoking material, the process comprising: (a) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (b) contacting the extracted tobacco components within the fluid, while the fluid is in a supercritical or subcritical state, with a smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components.
Claim 3
Dependent Claim
88 words
A process for providing a flavored smoking material of increased filling capacity, the process comprising: (a) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (b) contacting the extracted tobacco components, while the fluid is in a supercritical or subcritical state, with a smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components; and then (c) subjecting the smokable material to a supercritical or subcritical expansion process.
Claim 4
Dependent Claim
88 words
A process for providing a flavored smoking material of increased filling capacity, the process comprising: (a) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (b) contacting the extracted tobacco components, while the fluid is in a supercritical or subcritical state, with a smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components; and then (c) subjecting the smokable material to a supercritical or subcritical expansion process.
Claim 5
Dependent Claim
94 words
A process for providing a flavored smoking material of increased filling capacity, the process comprising: (a) subjecting smokable material to a supercritical or subcritical expansion process thereby providing an expanded smokable material; and then (b) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (c) contacting the extracted tobacco components, while the fluid is in a supercritical or subcritical state, with the expanded smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components.
Claim 6
Dependent Claim
94 words
A process for providing a flavored smoking material of increased filling capacity, the process comprising: (a) subjecting smokable material to a supercritical or subcritical expansion process thereby providing an expanded smokable material; and then (b) extracting tobacco components from tobacco material with a fluid under supercritical conditions thereby providing extracted tobacco components within the fluid; and then directly (c) contacting the extracted tobacco components, while the fluid is in a supercritical or subcritical state, with the expanded smokable material under conditions sufficient to provide smokable material in intimate contact with the extracted tobacco components.
Claim 7
Dependent Claim
15 words
The process of claim 1, 2 or 3 wherein the tobacco material is burley tobacco.
Claim 8
Dependent Claim
15 words
The process of claim 1, 2 or 3 wherein the smokable material is flue-cured tobacco.
Claim 9
Dependent Claim
23 words
The process of claim 1, 2 or 3 wherein the fluid for supercritically extracting tobacco components from the tobacco material is carbon dioxide.
Claim 10
Dependent Claim
22 words
The process of claim 2 or 3 wherein the supercritical or subcritical expansion process is performed using propane as an expansion gas.
Claim 11
Dependent Claim
25 words
The process of claim 1, 2 or 3 wherein the smokable material is contacted with the fluid while the fluid is in a supercritical state.
Claim 12
Dependent Claim
25 words
The process of claim 1, 2 or 3 wherein the smokable material is contacted with the fluid while the fluid is in a subcritical state.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |