US2739938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-chamber electrodialysis apparatus
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1951-08-14
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Granted: 1956-03-27
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Expires: 1971-08-14
Abstract
No abstract record available.
Inventors
- 👤 Wiechers Sybrandus Gerhardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:28
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/422; B01D2313/00; B01D2313/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN AN APPARATUS FOR THE CONTINUOUS ELECTRODIALYSIS OF LIQUIDS, HAVING TWO ELECTRODE CHAMBERS SEPARATED BY A DIALYSATE CHAMBER, A CYLINDRICAL OUTER ELECTRODE, A CYLINDRICAL INNER ELECTRODE, TWO THIN FLEXIBLE MEMBRANES OF CYLINDRICAL FORM SPACED FROM EACH OTHER AND DISPOSED BETWEEN SAID ELECTRODES IN SPACED RELATION THERETO, A HEAD ASSEMBLY AT ONE END OF SAID CYLINDRICAL ELECTRODES AND MEMBRANES AND A HEAD ASSEMBLY AT THE OTHER END THEREOF, SAID HEAD ASSEMBLIES SUPPORTING RESPECTIVE END PORTIONS OF SAID CYLINDRICAL ELECTRODES AND MEMBRANES IN CONCEN-
Claim 2
Dependent Claim
82 words
IN AN APPARATUS FOR THE CONTINUOUS ELECTRODIALYSIS OF LIQUIDS, HAVING TWO ELECTRODE CHAMBERS SEPARATED BY A DIALYSATE CHAMBER, A CYLINDRICAL OUTER ELECTRODE, A CYLINDRICAL INNER ELECTRODE, TWO THIN FLEXIBLE MEMBRANES OF CYLINDRICAL FORM SPACED FROM EACH OTHER AND DISPOSED BETWEEN SAID ELECTRODES IN SPACED RELATION THERETO, A HEAD ASSEMBLY AT ONE END OF SAID CYLINDRICAL ELECTRODES AND MEMBRANES AND A HEAD ASSEMBLY AT THE OTHER END THEREOF, SAID HEAD ASSEMBLIES SUPPORTING RESPECTIVE END PORTIONS OF SAID CYLINDRICAL ELECTRODES AND MEMBRANES IN CONCEN-
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |