Patent US3216920A successfully refreshed from Google Patents.
US3216920A
Expired / Lapsed
US
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Electrodialysis stack design
Assignee: AMF Inc
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Filing: 1960-11-28
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Granted: 1965-11-09
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Nellen William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:02
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/08; B01D63/082; B01D63/084; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/50; C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/4693; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN ELECTRODIALYSIS STACK COMPRISING, IN COMBINATION, MEMBRANES, AT LEAST SOME OF WHICH ARE ION SELECTIVE, CONTAINING FLUID FLOW APERTURES, GASKETS INTERSPERSED BETWEEN SAID MEMBRANES, SAID GASKETS CONTAINING FLUID FLOW APERTURES ALIGNED WITH THE FLUID FLOW APERTURES IN SAID MEMBRANES TO FROM AT LEAST TWO INTERNAL PASSAGES IN SAID ELECTRODIALYSIS STACK, SAID MEMBRANES EXTENDING OUTWARD BEYOND SAID GASKETS FORMING ELECTRODIALYSIS CELLS BETWEEN ADJACENT MEMBRANES WHOSE ENTIRE SURFACES ARE UNSECURED OUTSIDE SAID GASKETS, SAID GASKETS CONTAINING TRANSVERSE FLUID FLOW CHANNELS LEADING FROM THE PERIPHERY OF ADJACENT GASKETS TO INERNAL PASSAGES IN SAID STACK, ELECTRODES DISPOSED BEYOND SAID MEMBRANES, AND FLUID CONDUCTING
Claim 2
Dependent Claim
99 words
AN ELECTRODIALYSIS STACK COMPRISING, IN COMBINATION, MEMBRANES, AT LEAST SOME OF WHICH ARE ION SELECTIVE, CONTAINING FLUID FLOW APERTURES, GASKETS INTERSPERSED BETWEEN SAID MEMBRANES, SAID GASKETS CONTAINING FLUID FLOW APERTURES ALIGNED WITH THE FLUID FLOW APERTURES IN SAID MEMBRANES TO FROM AT LEAST TWO INTERNAL PASSAGES IN SAID ELECTRODIALYSIS STACK, SAID MEMBRANES EXTENDING OUTWARD BEYOND SAID GASKETS FORMING ELECTRODIALYSIS CELLS BETWEEN ADJACENT MEMBRANES WHOSE ENTIRE SURFACES ARE UNSECURED OUTSIDE SAID GASKETS, SAID GASKETS CONTAINING TRANSVERSE FLUID FLOW CHANNELS LEADING FROM THE PERIPHERY OF ADJACENT GASKETS TO INERNAL PASSAGES IN SAID STACK, ELECTRODES DISPOSED BEYOND SAID MEMBRANES, AND FLUID CONDUCTING
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |