Patent US3514398A successfully refreshed from Google Patents.
US3139435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for selective extraction of alkaloid
Assignee: Philip Morris USA Inc
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Filing: 1963-03-07
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Granted: 1964-06-30
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Staley John
- 👤 Clarke Allan Bellerby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:13
CPC Classifications
A; A61; A61K; A61K36/00; A61K36/18; A61K36/185; A61K36/81; A24; A24B; A24B15/00; A24B15/18; A24B15/24; A24B15/241; A24B15/243; A24B15/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A CONTINUOUS PROCESS FOR SELECTIVE REMOVAL AND RECOVERY OF ALKALOID FROM TOBACCO WHICH INCLUDES THE STEPS OF EXTRACTION OF TOBACCO WITH ORGANIC SOLVENT, CONTACTING THE RESULTANT ALKALOID-LADEN SOLVENT EXTRACT WITH BRINE TO REMOVE ALKALOID SELECTIVELY FROM SAID EXTRACT, RECYCLING THE ALKALOID-RELIEVED SOLVENT TO TOBACCO, RECOVERING ALKALOID FROM THE BRINE AND RECYCLING THE ALKALOIDRELIEVED BRINE FOR CONTACTING WITH FURTHER ALKALOID-LADEN SOLVENT, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE ALKALOID-LADEN SOLVENT WITH THE BRINE AT A TEMPERATURE SUBSTANTIALLY BELOW THAT AT WHICH ALKALOID ULTIMATELY IS RECOVERED FROM THE BRINE AND AT A PH BELOW ABOUT 6.5, THEREAFTER WARMING THE RESULTANT ALKALOID-ENRICHED BRINE TO A TEMPERATURE AT WHICH AN ALKALOID PHASE SEPARATES FROM THE BRINE, AND EFFECTING PHYSICAL REMOVAL OF THE ALKALOID PHASE FROM THE BRINE.
Claim 2
Dependent Claim
123 words
IN A CONTINUOUS PROCESS FOR SELECTIVE REMOVAL AND RECOVERY OF ALKALOID FROM TOBACCO WHICH INCLUDES THE STEPS OF EXTRACTION OF TOBACCO WITH ORGANIC SOLVENT, CONTACTING THE RESULTANT ALKALOID-LADEN SOLVENT EXTRACT WITH BRINE TO REMOVE ALKALOID SELECTIVELY FROM SAID EXTRACT, RECYCLING THE ALKALOID-RELIEVED SOLVENT TO TOBACCO, RECOVERING ALKALOID FROM THE BRINE AND RECYCLING THE ALKALOIDRELIEVED BRINE FOR CONTACTING WITH FURTHER ALKALOID-LADEN SOLVENT, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE ALKALOID-LADEN SOLVENT WITH THE BRINE AT A TEMPERATURE SUBSTANTIALLY BELOW THAT AT WHICH ALKALOID ULTIMATELY IS RECOVERED FROM THE BRINE AND AT A PH BELOW ABOUT 6.5, THEREAFTER WARMING THE RESULTANT ALKALOID-ENRICHED BRINE TO A TEMPERATURE AT WHICH AN ALKALOID PHASE SEPARATES FROM THE BRINE, AND EFFECTING PHYSICAL REMOVAL OF THE ALKALOID PHASE FROM THE BRINE.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |