Patent US2641543A successfully refreshed from Google Patents.
US2641543A
Expired / Lapsed
US
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Ion exchange treatment of alcohol solutions
Assignee: Joseph E Seagram and Sons Inc
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Filing: 1950-01-11
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Granted: 1953-06-09
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Expires: 1970-01-11
Abstract
No abstract record available.
Inventors
- 👤 Earl D Unger
- 👤 Le Roy A Smith
- 👤 Herman F Willkie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:58
CPC Classifications
C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0432
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
THE PROCESS OF TREATING AN ALCOHOL SOLUTION CONTAINING CONGENERIC PRODUCTS OF FERMENTATION WHICH COMPRISES: CONTACTING THE SOLUTION WITH A REACTIVE INSOLUBLE BISULFITE MATERIAL AND WITH A QUATERNARY ANMONIUM ONION EXCHANGE MATERIAL.
References Cited (Backward Citations)
US2223930A
Cited
US2258216A
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US2285750A
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US2341907A
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US2419628A
Cited
US2469683A
Cited
US2500171A
Cited
US2520189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |