Patent US2721171A successfully refreshed from Google Patents.
US2721171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic electrochemical reactions
Assignee: EIDP Inc
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Filing: 1951-11-01
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Granted: 1955-10-18
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Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Arnold Harold Wilfred
- 👤 Gilbert P Monet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:53
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
PROCESS OF CARRYING OUT IONIC ELECTRO-CHEMICAL REACTIONS WHICH COMPRISES CONDUCTING AN ELECTRIC CURRENT THROUGH A SERIES OF AQUEOUS SOLUTIONS OF IONIZABLE COMPOUNDS SEPARATED ALTERNATELY BY SELECTIVE ANION AND CATION BARRIER MEMBRANES, AT LEAST ONE INTERMEDIATE SOLUTION IN SAID SERIES BEING AN AQUEOUS SOLUTION OF A COMPOUND FROM THE GROUP CONSISTING OF STRONG ACIDS AND BASES HAVING A MOLECULAR WEIGHT OF AT LEAST 200, ALL OF WHOSE IONS OF ONE SIGN ARE TOO LARGE TO PASS THROUGH SAID BARRIER MEMBRANES AND ALL OF WHOSE IONS OF THE OPPOSITE SIGN ARE SMALL ENOUGH TO PASS THROUGH SAID BARRIER MEMBRANES, SAID INTERMEDIATE SOLUTION BEING SEPARATED BY A SELECTIVE CATION BARRIER MEMBRANE FROM THE ADJACENT AQUEOUS SOLUTION ON THE ANODE SIDE AND BY A SELECTIVE ANION BARRIER MEMBRANE FROM THE ADJACENT SOLUTION ON THE CATHODE SIDE OF SAID SERIES.
Claim 2
Dependent Claim
135 words
PROCESS OF CARRYING OUT IONIC ELECTRO-CHEMICAL REACTIONS WHICH COMPRISES CONDUCTING AN ELECTRIC CURRENT THROUGH A SERIES OF AQUEOUS SOLUTIONS OF IONIZABLE COMPOUNDS SEPARATED ALTERNATELY BY SELECTIVE ANION AND CATION BARRIER MEMBRANES, AT LEAST ONE INTERMEDIATE SOLUTION IN SAID SERIES BEING AN AQUEOUS SOLUTION OF A COMPOUND FROM THE GROUP CONSISTING OF STRONG ACIDS AND BASES HAVING A MOLECULAR WEIGHT OF AT LEAST 200, ALL OF WHOSE IONS OF ONE SIGN ARE TOO LARGE TO PASS THROUGH SAID BARRIER MEMBRANES AND ALL OF WHOSE IONS OF THE OPPOSITE SIGN ARE SMALL ENOUGH TO PASS THROUGH SAID BARRIER MEMBRANES, SAID INTERMEDIATE SOLUTION BEING SEPARATED BY A SELECTIVE CATION BARRIER MEMBRANE FROM THE ADJACENT AQUEOUS SOLUTION ON THE ANODE SIDE AND BY A SELECTIVE ANION BARRIER MEMBRANE FROM THE ADJACENT SOLUTION ON THE CATHODE SIDE OF SAID SERIES.
References Cited (Backward Citations)
US2502614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |