US2805667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating tobacco
Assignee: Martin Brinkmann K G
•
Filing: 1954-09-09
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Granted: 1957-09-10
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Expires: 1974-09-09
Abstract
No abstract record available.
Inventors
- 👤 Bethmann Max-Bartold Freih Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:08
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A PROCESS FOR EXTRACTING NICOTINE FROM TOBACCO, COMPRISING THE STEPS OF TREATING A PREDETERMINED QUANTITY OF TOBACCO WITH A FIRST AMOUNT OF WATER EQUAL TO BETWEEN EIGHT AND TWELVE TIMES THE WEIGHT OF SAID TOBACCO SO AS TO EXTRACT THE WATER SOLUBLE COMPONENTS OF SAID TOBACCO INCLUDING THE NICOTINE AND METAL IONS, AND FROM AN AQUEOUS EXTRACT SOLUTION THEREOF; SEPARATING A MAJOR PREDETERMINED PORTION OF SAID AQUEOUS EXTRACT SOLUTION FROM SAID TOBACCO; ADDING TO THE THUS REMAINING TOBACCO AN AMOUNT OF WATER EQUAL TO SAID FIRST AMOUNT OF WATER; SEPARATING A PORTION OF THE THUS FORMED AQUEOUS EXTRACT SOLUTION EQUAL TO SAID MAJOR PREDETERMINED PORTION THEREOF; REPEATING SAID TREATING AND SEPARATING STEPS WITH FRESH WATER A PREDETERMINED NUMBER OF TIMES; SUBJECTING SAID SEPARATED EXTRACT SOLUTIONS TO ION EXCHANGE AT A PH NOT HIGHER THAN 7.0 WITH AN ION EXCHANGER ADAPTED TO REMOVE THE NICOTINE FROM SAID EXTRACT SOLUTIONS, THEREBY OBTAINING DE-NICOTINIZED EXTRACT SOLUTION; MIXING SAID DE-NICOTIN-
Claim 2
Dependent Claim
156 words
A PROCESS FOR EXTRACTING NICOTINE FROM TOBACCO, COMPRISING THE STEPS OF TREATING A PREDETERMINED QUANTITY OF TOBACCO WITH A FIRST AMOUNT OF WATER EQUAL TO BETWEEN EIGHT AND TWELVE TIMES THE WEIGHT OF SAID TOBACCO SO AS TO EXTRACT THE WATER SOLUBLE COMPONENTS OF SAID TOBACCO INCLUDING THE NICOTINE AND METAL IONS, AND FROM AN AQUEOUS EXTRACT SOLUTION THEREOF; SEPARATING A MAJOR PREDETERMINED PORTION OF SAID AQUEOUS EXTRACT SOLUTION FROM SAID TOBACCO; ADDING TO THE THUS REMAINING TOBACCO AN AMOUNT OF WATER EQUAL TO SAID FIRST AMOUNT OF WATER; SEPARATING A PORTION OF THE THUS FORMED AQUEOUS EXTRACT SOLUTION EQUAL TO SAID MAJOR PREDETERMINED PORTION THEREOF; REPEATING SAID TREATING AND SEPARATING STEPS WITH FRESH WATER A PREDETERMINED NUMBER OF TIMES; SUBJECTING SAID SEPARATED EXTRACT SOLUTIONS TO ION EXCHANGE AT A PH NOT HIGHER THAN 7.0 WITH AN ION EXCHANGER ADAPTED TO REMOVE THE NICOTINE FROM SAID EXTRACT SOLUTIONS, THEREBY OBTAINING DE-NICOTINIZED EXTRACT SOLUTION; MIXING SAID DE-NICOTIN-
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |