Patent US2735812A successfully refreshed from Google Patents.
US2735812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Van hoek
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:58
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/50; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144; B01D61/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN ELECTRODIALYZING APPARATUS COMPRISING A CHAMBER CONTAINING ELECTRODES AND FLEXIBLE PERMEABLE MEMBRANES FORMING COMPARTMENTS THEREBETWEEN AND MEANS FOR DIRECTING LIQUID THROUGH SAID COMPARTMENTS INCLUDING AN INLET FOR LIQUID AT ONE END OF THE COMPARTMENT AND AN OUTLET FOR LIQUID AT THE OTHER END, THE COMBINATION THEREWITH OF SUPPORTING MEMBERS INTERPOSED BETWEEN AND ENGAGING SAID MEMBRANES AND SAID ELECTRODES TO MAINTAIN THEM IN ACCURATELY SPACED RELATION, SAID SUPPORTNG MEMBERS COMPRISING SHEETS OF INSULATING MATERIAL HAVING A MULTIPLICITY OF PERFORATIONS WIDELY DISTRIBUTED THEREIN, SAID SHEETS HAVING CORRUGATIONS THEREIN TO ENGAGE SAID ELECTRODES AND SAID MEMBRANES, SAID CORRUGATIONS BEING INTERRUPTED TO AVOID UNINTERRUPTED LINE CONTACT BETWEEN SAID SUPPORTING MEMBERS AND THE ELECTRODES AND MEMBRANES.
Claim 2
Dependent Claim
111 words
IN ELECTRODIALYZING APPARATUS COMPRISING A CHAMBER CONTAINING ELECTRODES AND FLEXIBLE PERMEABLE MEMBRANES FORMING COMPARTMENTS THEREBETWEEN AND MEANS FOR DIRECTING LIQUID THROUGH SAID COMPARTMENTS INCLUDING AN INLET FOR LIQUID AT ONE END OF THE COMPARTMENT AND AN OUTLET FOR LIQUID AT THE OTHER END, THE COMBINATION THEREWITH OF SUPPORTING MEMBERS INTERPOSED BETWEEN AND ENGAGING SAID MEMBRANES AND SAID ELECTRODES TO MAINTAIN THEM IN ACCURATELY SPACED RELATION, SAID SUPPORTNG MEMBERS COMPRISING SHEETS OF INSULATING MATERIAL HAVING A MULTIPLICITY OF PERFORATIONS WIDELY DISTRIBUTED THEREIN, SAID SHEETS HAVING CORRUGATIONS THEREIN TO ENGAGE SAID ELECTRODES AND SAID MEMBRANES, SAID CORRUGATIONS BEING INTERRUPTED TO AVOID UNINTERRUPTED LINE CONTACT BETWEEN SAID SUPPORTING MEMBERS AND THE ELECTRODES AND MEMBRANES.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |