US5143097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco reconstitution process
Assignee: RJ Reynolds Tobacco Co
•
Filing: 1991-01-28
•
Granted: 1992-09-01
•
Expires: 2011-01-28
Abstract
Abstract Reconstituted tobacco has phosphate salts incorporated therein. Tobacco is extracted with water to yield an insoluble portion and an aqueous portion containing water soluble tobacco components. The aqueous portion is contacted with diammonium hydrogen orthophosphate and adjusted to a pH of about 6.5. The extract then is applied to the insoluble portion which has been formed into a sheet-like shape. The resulting tobacco composition is dried to yield a reconstituted tobacco material.
Inventors
- 👤 Edward J. Stephen Sohn
- 👤 Harvey J. Young
- 👤 Edward Bernasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/12; A24B15/18; A24B15/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A process for providing a reconstituted tobacco material, the process comprising the steps of: (a) extracting components from tobacco material using a solvent having an aqueous character thereby providing (i) a solvent having extracted tobacco components therein, and (ii) a tobacco portion insoluble in the solvent; (b) separating at least a portion of the solvent and extracted tobacco components therein from the insoluble tobacco portion; and then (c) forming the insoluble tobacco portion into a predetermined shape; (d) contacting the solvent and extracted tobacco components provided in step (b) with a water soluble phosphate salt; (e) providing the portion of solvent and extracted components provided in step (d) at a pH of above about 5.5 to about 8; and (f) contacting the insoluble tobacco portion of step (c) with the solvent and extracted tobacco components of step (d) to provide a phosphate-containing tobacco material.
Claim 2
Dependent Claim
144 words
A process for providing a reconstituted tobacco material, the process comprising the steps of: (a) extracting components from tobacco material using a solvent having an aqueous character thereby providing (i) a solvent having extracted tobacco components therein, and (ii) a tobacco portion insoluble in the solvent; (b) separating at least a portion of the solvent and extracted tobacco components therein from the insoluble tobacco portion; and then (c) forming the insoluble tobacco portion into a predetermined shape; (d) contacting the solvent and extracted tobacco components provided in step (b) with a water soluble phosphate salt; (e) providing the portion of solvent and extracted components provided in step (d) at a pH of above about 5.5 to about 8; and (f) contacting the insoluble tobacco portion of step (c) with the solvent and extracted tobacco components of step (d) to provide a phosphate-containing tobacco material.
Claim 3
Dependent Claim
18 words
The process of claim 1 whereby the solvent and extracted tobacco components are contacted with diammonium hydrogen orthophosphate.
Claim 4
Dependent Claim
16 words
The process of claim 1 whereby the insoluble tobacco portion is formed into a sheet-like shape.
Claim 5
Dependent Claim
27 words
The process of claim 3 whereby the tobacco material provided in step (e) is dried to a moisture content of about 10 to about 15 weight percent.
Claim 6
Dependent Claim
34 words
The process of claim 1 or 2 whereby the water soluble phosphate salt is contacted with the solvent and extract which are maintained at a temperature of about 110° F. to about 160° F.
Claim 7
Dependent Claim
48 words
The process of claim 4 whereby the solvent and extracted components are contacted with sufficient phosphate salt in step (d) such that the phosphate content of the resulting reconstituted tobacco material is about 1 percent to about 2.5 percent, based on the dry weight of that resulting material.
Claim 8
Dependent Claim
28 words
The process of claim 1 whereby the portion of solvent and extracted components provided in step (e) are provided at a pH of about 5.6 to about 6.8.
Claim 9
Dependent Claim
27 words
The process of claim 1 whereby the portion of solvent and extracted components provided in step (e) are provided at a pH of about 6 or above.
Claim 10
Dependent Claim
20 words
The process of claim 1 whereby step (e) includes contacting the solvent and extracted tobacco with ammonia or ammonium hydroxide.
Claim 11
Dependent Claim
26 words
The process of claim 1 whereby the solvent and extract of step (e) are maintained at a temperature of about 100° F. to about 200° F.
References Cited (Backward Citations)
US1016844A
Cited
US1068403A
Cited
US3428053A
Cited
US3353541A
Cited
US3386449A
Cited
US3386450A
Cited
US3435829A
Cited
US3398754A
Cited
US3411514A
Cited
US3409026A
Cited
US3411515A
Cited
US3420241A
Cited
US3540455A
Cited
US3464422A
Cited
US3483874A
Cited
US3616801A
Cited
US3847164A
Cited
US4421126A
Cited
US4674519A
Cited
US4962774A
Cited
US4972854A
Cited
US4987906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |