US3014855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of concentrating dissolved salts by electrodialysis
Assignee: Permutit Co Ltd
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Filing: 1959-05-05
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Granted: 1961-12-26
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Expires: 1979-05-05
Abstract
No abstract record available.
Inventors
- 👤 Kressman Theodore Roger Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:55
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN AN ELECTRODIALYTIC PROCESS OF THE KIND IN WHICH LIQUID STREAMS CONTAINING DISSOLVED SALTS ARE PASSED THROUGH ALTERNATE COMPARTMENTS BOUNDED BY ION-SELECTIVE MEMBBRANES TO CAUSE MIGRATION OF IONS FROM A DESALTING STREAM TO A CONCENTRATING STREAM UNDER THE INFLUENCE OF AN ELECTRIC CURRENT, A METHOD OF CONCENTRATING THE SALTS DISSOLVED IN A LIQUID CONTAINING NO MORE THAN 1000P.P.M. OF SUCH DISSOLVED SALTS WHICH COMPRISES PASSING THE LIQUID AS THE DESALTING STREAM THROUGH COMPARTMENTS FILLED WITH MATERIAL HAVING ION-EXCHANGE PROPERTIES TO CAUSE MIGRATION OF THE IONS OF THE DISSOLVED SALTS INTO NEIGHBOURING COMPARTMENTS IN WHICH A CONCENTRATING STREAM TURN SUBJECTING AT LEAST PART OF THIS CONCENTRATING STREAM TO ELECTRODIALYSIS IN UNFILLED COMPARTMENTS AS THE DESALTING STREAM TO CONCENTRATE THE SALTS INTO A SECOND CONCENTRATING STREAM, AND RETURNING THIS DESALTING STREAM FROM SAID UNFILLED COMPARTMENTS TO FORM AT LEAST PART OF THE CONCENTRATING STREAM INTO WHICH THE IONS FROM THE ORIGINAL LIQUID MIGRATE.
Claim 2
Dependent Claim
151 words
IN AN ELECTRODIALYTIC PROCESS OF THE KIND IN WHICH LIQUID STREAMS CONTAINING DISSOLVED SALTS ARE PASSED THROUGH ALTERNATE COMPARTMENTS BOUNDED BY ION-SELECTIVE MEMBBRANES TO CAUSE MIGRATION OF IONS FROM A DESALTING STREAM TO A CONCENTRATING STREAM UNDER THE INFLUENCE OF AN ELECTRIC CURRENT, A METHOD OF CONCENTRATING THE SALTS DISSOLVED IN A LIQUID CONTAINING NO MORE THAN 1000P.P.M. OF SUCH DISSOLVED SALTS WHICH COMPRISES PASSING THE LIQUID AS THE DESALTING STREAM THROUGH COMPARTMENTS FILLED WITH MATERIAL HAVING ION-EXCHANGE PROPERTIES TO CAUSE MIGRATION OF THE IONS OF THE DISSOLVED SALTS INTO NEIGHBOURING COMPARTMENTS IN WHICH A CONCENTRATING STREAM TURN SUBJECTING AT LEAST PART OF THIS CONCENTRATING STREAM TO ELECTRODIALYSIS IN UNFILLED COMPARTMENTS AS THE DESALTING STREAM TO CONCENTRATE THE SALTS INTO A SECOND CONCENTRATING STREAM, AND RETURNING THIS DESALTING STREAM FROM SAID UNFILLED COMPARTMENTS TO FORM AT LEAST PART OF THE CONCENTRATING STREAM INTO WHICH THE IONS FROM THE ORIGINAL LIQUID MIGRATE.
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) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |