US4628947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for modifying the flavor characteristics of bright tobacco
Assignee: Philip Morris USA Inc
•
Filing: 1985-07-05
•
Granted: 1986-12-16
•
Expires: 2005-07-05
Abstract
Abstract A method for modifying the smoking flavor characteristics of bright tobacco, involves treating the tobacco with liquid ammonia, separating the resulting ammonia solution from the tobacco, concentrating the solution by evaporating the ammonia, dissolving the concentrate in a solvent and reapplying the dissolved residue to the once-treated tobacco.
Inventors
- 👤 Dennis M. Driscoll
- 👤 Everett W. Southwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:00
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A method for modifying the smoke flavor characteristics of bright tobacco comprising the steps of: treating said tobacco with liquid ammonia at a temperature of between about -80° C. to about 50° C. in an amount sufficient to obtain a liquid extract comprising ammonia and extracted tobacco components; and applying said liquid extract to said treated tobacco.
Claim 2
Independent Claim
57 words
A method for modifying the smoke flavor characteristics of bright tobacco comprising the steps of: treating said tobacco with liquid ammonia at a temperature of between about -80° C. to about 50° C. in an amount sufficient to obtain a liquid extract comprising ammonia and extracted tobacco components; and applying said liquid extract to said treated tobacco.
Claim 3
Dependent Claim
21 words
The method according to claim 1, wherein said treating step has a duration of between about 1/2 to about 5 hours.
Claim 4
Dependent Claim
19 words
The method according to claim 1, wherein said temperature is within the range of -60° C. to -33.5° C.
Claim 5
Dependent Claim
21 words
The method according to claim 1, wherein said bright tobacco has a moisture content of between about 4 to about 22%.
Claim 6
Dependent Claim
13 words
The method according to claim 1, wherein said treating step employs atmospheric pressure.
Claim 7
Dependent Claim
30 words
The method according to claim 1, wherein said applying step comprises permitting the liquid ammonia in said extract to evaporate while said liquid extract is in contact with said tobacco.
Claim 8
Dependent Claim
28 words
The method according to claim 1, wherein said applying step comprises: separating said liquid extract from the treated tobacco; and reapplying said liquid extract to said treated tobacco.
Claim 9
Dependent Claim
58 words
The method according to claim 1, wherein said applying step comprises the steps of: (a) separating said liquid extract from said treated tobacco; (b) evaporating all ammonia from said extract to provide a concentrate of said tobacco components; (c) dissolving said concentrate in an appropriate solvent; and (d) applying the solution of step (c) to said treated tobacco.
Claim 10
Dependent Claim
23 words
The method according to claim 8, wherein said solvent of step (c) is selected from the group consisting of water and an alcohol.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |