US2756202A
Expired / Lapsed
US
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Cation exchange membranes comprising condensation polymers of sulfonated alkyl aryl ethers
Assignee: Veolia WTS Systems USA Inc
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Filing: 1952-01-25
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Granted: 1956-07-24
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Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Clarke John Thacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:13
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2256; C08J2371/00; C08J2371/08; C08J2371/10; C08J2371/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF TREATING SOLUTIONS OF ELECTROLYTES TO REMOVE CATIONS THEREFROM WHICH COMPRISES CONTACTING SAID SOLUTIONS WITH A BARRIER COMPRISING A SOLID UNFRACTURED STRUCTURE OF A WATER INSOLUBLE CONDENSATION POLYMER OF A METHYLOL-FORMING SULFONATED ALKYL ARYL ETHER AND AN ALDEHYDE, IN GEL RELATIONSHIP WITH AT LEAST 20 PER CENT BY WEIGHT OF A SOLVENT, THE LATTER PRESENTING A CONTINUOUS PHASE THROUGHOUT SAID GEL, AND PASSING A DIRECT ELECTRIC CURRENT THROUGH SAID SOLUTIONS AND BARRIER TO EFFECT THE MIGRATION OF THE CATIONS FROM SAID SOLUTIONS INTO SAID BARRIER.
Claim 2
Independent Claim
87 words
THE METHOD OF TREATING SOLUTIONS OF ELECTROLYTES TO REMOVE CATIONS THEREFROM WHICH COMPRISES CONTACTING SAID SOLUTIONS WITH A BARRIER COMPRISING A SOLID UNFRACTURED STRUCTURE OF A WATER INSOLUBLE CONDENSATION POLYMER OF A METHYLOL-FORMING SULFONATED ALKYL ARYL ETHER AND AN ALDEHYDE, IN GEL RELATIONSHIP WITH AT LEAST 20 PER CENT BY WEIGHT OF A SOLVENT, THE LATTER PRESENTING A CONTINUOUS PHASE THROUGHOUT SAID GEL, AND PASSING A DIRECT ELECTRIC CURRENT THROUGH SAID SOLUTIONS AND BARRIER TO EFFECT THE MIGRATION OF THE CATIONS FROM SAID SOLUTIONS INTO SAID BARRIER.
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |