US3136710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis
Assignee: Sulphite Products Corp
•
Filing: 1960-09-07
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Granted: 1964-06-09
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Expires: 1980-09-07
Abstract
No abstract record available.
Inventors
- 👤 George A Dubey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144; B01D61/46; B01D61/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A PROCESS FOR THE ELECTRODIALYTIC TREATMENT OF SPENT SULPHITE LIQUOR TO RECOVER ACID IONS THEREFROM, PROVIDING IONIZABLE AQUEOUS SOLUTIONS IN SUCCESSIVE POSITIONS, SAID AQUEOUS SOLUTIONS COMPRISING AN ANION CONCENTRATING SOLUTION, A SPENT SULPHITE LIQUOR TO BE ELECTRODIALYZED, A CATION CONCENTRATING SOLUTION, AND A BARRIER SOLUTION COMPRISING SULPHUROUS ACID, ESTABLISHING A DIRECT CURRENT ELEC-
Claim 2
Dependent Claim
54 words
IN A PROCESS FOR THE ELECTRODIALYTIC TREATMENT OF SPENT SULPHITE LIQUOR TO RECOVER ACID IONS THEREFROM, PROVIDING IONIZABLE AQUEOUS SOLUTIONS IN SUCCESSIVE POSITIONS, SAID AQUEOUS SOLUTIONS COMPRISING AN ANION CONCENTRATING SOLUTION, A SPENT SULPHITE LIQUOR TO BE ELECTRODIALYZED, A CATION CONCENTRATING SOLUTION, AND A BARRIER SOLUTION COMPRISING SULPHUROUS ACID, ESTABLISHING A DIRECT CURRENT ELEC-
References Cited (Backward Citations)
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Cited
US2794776A
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US2810686A
Cited
US2878178A
Cited
US2829095A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |