Patent US4289148A successfully refreshed from Google Patents.
US4289148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the filling capacity of tobacco
Assignee: HF and PhF Reemtsma GmbH and Co
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Filing: 1980-01-25
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Granted: 1981-09-15
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Expires: 2000-01-25
Abstract
Abstract The filling capacity of tobacco is improved by treating the tobacco with inert gas under pressure and subsequently heating after relieving the pressure. The tobacco is treated with nitrogen or argon at a working pressure between 300 and 1000 bar and working temperature in the range of 0° to 50° C. and after relieving the pressure then is treated briefly at a temperature of 100° to 400° C. or is subjected to microwave heating.
Inventors
- 👤 Klaus-Dieter Ziehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:25
CPC Classifications
A; A24; A24B; A24B3/00; A24B3/18; A24B3/182
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
84 words
In a process for improving the filling capacity of tobacco comprising treating the tobacco with gas under pressure and subsequent heating after relief of the pressure, the improvement comprising treating the tobacco with nitrogen or argon at a working pressure between 300 and 1000 bar and at a working temperature in the range 0° to 50° C. followed, after pressure relief, by brief treatment at a temperature of 100° to 400° C. or by microwave heating thereby improving the filling capacity of the tobacco.
Claim 2
Dependent Claim
84 words
In a process for improving the filling capacity of tobacco comprising treating the tobacco with gas under pressure and subsequent heating after relief of the pressure, the improvement comprising treating the tobacco with nitrogen or argon at a working pressure between 300 and 1000 bar and at a working temperature in the range 0° to 50° C. followed, after pressure relief, by brief treatment at a temperature of 100° to 400° C. or by microwave heating thereby improving the filling capacity of the tobacco.
Claim 3
Dependent Claim
26 words
A process according to claim 1 wherein the tobacco is treated with nitrogen at 500 to 800 bar and is then briefly heat-treated at 250° C.
Claim 4
Dependent Claim
27 words
A process according to claim 2 wherein a tobacco is treated whose moisture content has been increased before said treatment to a range of 20 to 25%.
Claim 5
Dependent Claim
17 words
A process according to claim 3 wherein the pressure relief is effected within 0.5 to 10 minutes.
Claim 6
Dependent Claim
17 words
A process according to claim 4 wherein the pressure relief is effected within 0.5 to 3 minutes.
Claim 7
Dependent Claim
24 words
A process according to claim 1 wherein the tobacco is treated at a temperature of 100° to 300° C. after the relief of pressure.
Claim 8
Dependent Claim
20 words
A process according to claim 1 wherein the heating is carried out by microwave heating after the relief of pressure.
Claim 9
Dependent Claim
22 words
A process according to claim 1 wherein the heating is carried out at 100° to 400° C. after the relief of pressure.
Claim 10
Dependent Claim
15 words
A process according to claim 8 wherein the heating is for 0.1 to 10 minutes.
Claim 11
Dependent Claim
21 words
A process according to claim 9 wherein the pressure of 300 to 1000 bar is applied for 0.5 to 10 minutes.
Claim 12
Dependent Claim
27 words
A process according to claim 1 wherein a tobacco is treated whose moisture content has been increased before said treatment to a range of 20 to 25%.
Claim 13
Dependent Claim
25 words
A process according to claim 11 wherein the tobacco is treated at a temperature of 100° to 400° C. after the relief of the pressure.
Claim 14
Dependent Claim
15 words
A process according to claim 12 wherein the heating is for 0.1 to 10 minutes.
Claim 15
Dependent Claim
17 words
A process according to claim 13 wherein the pressure relief is effected within 0.5 to 10 minutes.
Claim 16
Dependent Claim
17 words
A process according to claim 14 wherein the pressure relief is effected within 0.5 to 3 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |