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Patent US3671263A successfully refreshed from Google Patents.
US3671263A
Expired / Lapsed
US
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Semi-continuous countercurrent decaffeination process
Assignee: Procter and Gamble Co
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Filing: 1971-02-23
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Granted: 1972-06-20
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Expires: 1991-02-23
Abstract
Abstract A SEMI-CONTINUOUS STAGED COUNTERCURRENT EXTRACTION PROCESS INVOLVING HIGH EXTRACTION TEMPERATURE, HIGH PREWETTING MOISTURE, HIGH SOLVENT EXCHANGE RATES, AND HIGH SOLVENT SUPERFICIAL VELOCITY IS USED TO SUBSTANTIALLY DECREASE CAFFEINE EXTRACTING PROCESS TIMES.
Inventors
- 👤 Jayantilal M Patel
- 👤 Alan B Wolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/20; A23F5/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |