US2921005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic conversions with permselective membranes
Assignee: Rohm and Haas Co
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Filing: 1952-10-17
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Granted: 1960-01-12
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 George W Bodamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/141; C01B33/142; C01B33/143; C01B33/1435; B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; C01B17/00; C01B17/48
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
AN ELECTROLYTIC PROCESS FOR CONVERTING A WATERSOLUBLE SALT OF A WEAK ACID INTO SAID ACID WHICH COMPRISES PASSING A DIRECT ELECTRIC CURRENT THROUGH AN AQUEOUS SOLUTION OF SAID SALT WHILE IT IS POSITIONED BETWEEN A FIRST CATIONIC PERMSELECTIVE MEMBRANE ADJACENT THE ANODE AND A SECOND CATIONIC PERMSELECTIVE MEMBRANE, WHICH MEMBRANES CONTAIN A CATION-EXCHANGE RESIN, ON THE OPPOSITE SIDES OF WHICH MEMBBRANES ARE CONDUCTIVE AQUEOUS SOLUTIONS, ONE OF WHICH IS AN ANOLYTE CAPABLE OF PRODUCING
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |