Patent US2799644A successfully refreshed from Google Patents.
US2799644A
Expired / Lapsed
US
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Apparatus for transferring electrolytes from one solution into another
Assignee: Individual
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Filing: 1955-11-18
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Granted: 1957-07-16
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Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN APPARATUS FOR THE CONTINUOUS TRANSFER OF IONS FROM ONE VOLUME OF LIQUID INTO ANOTHER, THE APPARATUS COMPRISING, A STACK OF PERMSELECTED MEMBRANES, ALTERNATING MEMBRANES BEING PERMEABLE TO IONS OF ONE SIGN AND PASSAGE RESISTANT TO IONS OF THE OPPOSITE SIGN, THE REMAINING MEMBRANES BEING PERMEABLE TO IONS OF THE OPPOSITE SIGN, SAID MEMBRANES COMPRISING A MARGINAL SEALING AREA AND A CENTRAL BODY AREA OF THE SAME MATERIAL AS THE MARGINAL AREA AND INTEGRAL THEREWITH CERTAIN OF SAID MEMBRANCES HAVING, AT LEAST ON ONE SIDE, PROJECTIONS INTEGRAL WITH, AND OF THE SAME MATERIAL, AS THE CENTRAL AREA, SAID PROJECTIONS BEARING AGAINST THE SURFACE OF THE NEXT MEMBRANE IN THE STACK TO SPACE THE MEMBRANES APART SO AS TO PROVIDE LIQUID CHAMBERS OF PREDETERMINED THICKNESS BETWEEN ADJACENT MEMBRANCES ANT TO PROVIDE PORTIONS OF MEMBRANE-TO-MEMBRANE CONTACT WITHIN SAID CHAMBER THROUGH WHICH PORTIONS CERTAIN IONS MAY PASS
Claim 2
Independent Claim
144 words
AN APPARATUS FOR THE CONTINUOUS TRANSFER OF IONS FROM ONE VOLUME OF LIQUID INTO ANOTHER, THE APPARATUS COMPRISING, A STACK OF PERMSELECTED MEMBRANES, ALTERNATING MEMBRANES BEING PERMEABLE TO IONS OF ONE SIGN AND PASSAGE RESISTANT TO IONS OF THE OPPOSITE SIGN, THE REMAINING MEMBRANES BEING PERMEABLE TO IONS OF THE OPPOSITE SIGN, SAID MEMBRANES COMPRISING A MARGINAL SEALING AREA AND A CENTRAL BODY AREA OF THE SAME MATERIAL AS THE MARGINAL AREA AND INTEGRAL THEREWITH CERTAIN OF SAID MEMBRANCES HAVING, AT LEAST ON ONE SIDE, PROJECTIONS INTEGRAL WITH, AND OF THE SAME MATERIAL, AS THE CENTRAL AREA, SAID PROJECTIONS BEARING AGAINST THE SURFACE OF THE NEXT MEMBRANE IN THE STACK TO SPACE THE MEMBRANES APART SO AS TO PROVIDE LIQUID CHAMBERS OF PREDETERMINED THICKNESS BETWEEN ADJACENT MEMBRANCES ANT TO PROVIDE PORTIONS OF MEMBRANE-TO-MEMBRANE CONTACT WITHIN SAID CHAMBER THROUGH WHICH PORTIONS CERTAIN IONS MAY PASS
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |