US3341479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triaminotriphenylmethane modified phenolsulfonic acid-formaldehyde ion exchange resin membranes
Assignee: General Electric Co
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Filing: 1964-03-26
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Granted: 1967-09-12
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Aftergut Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:26
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2256; C08J2365/00; C08J2365/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR FORMING A FLEXIBLE CATION EXCHANGE STRUCTURE HAVING AT LEAST TWO DIMENSIONS IN EXCESS OF 0.25 INCH COMPRISING MIXING TRIAMINOTRIPHENYLMETHANE AND A SULFONATED AROMATIC COMPOUND CHOSEN FROM THE GROUP CONSISTING OF SULFONATED DIPHENYL ETHER, PHENOLSULFONIC ACID, ANISOLESULFONIC ACID, ALPHA-NAPHTHOL-SULFONIC ACID, BETA-NAPHTHOLSULFONIC ACID, AND CRESOLSULFONIC ACID, REACTING THE MIXTURE FORMED BY SAID TRIAMINOTRIPHENYLMETHANE AND SAID SULFONATED AROMATIC COMPOUND WITH AN ALDEHYDE CHOSEN FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PARAFORMALDEHYDE, AND SHAPING AND HEATING TO CURE AT A TEMPERATURE OF FROM ABOUT 80 TO 90*C. FOR ABOUT 6 TO 27 HOURS.
Claim 2
Dependent Claim
92 words
A PROCESS FOR FORMING A FLEXIBLE CATION EXCHANGE STRUCTURE HAVING AT LEAST TWO DIMENSIONS IN EXCESS OF 0.25 INCH COMPRISING MIXING TRIAMINOTRIPHENYLMETHANE AND A SULFONATED AROMATIC COMPOUND CHOSEN FROM THE GROUP CONSISTING OF SULFONATED DIPHENYL ETHER, PHENOLSULFONIC ACID, ANISOLESULFONIC ACID, ALPHA-NAPHTHOL-SULFONIC ACID, BETA-NAPHTHOLSULFONIC ACID, AND CRESOLSULFONIC ACID, REACTING THE MIXTURE FORMED BY SAID TRIAMINOTRIPHENYLMETHANE AND SAID SULFONATED AROMATIC COMPOUND WITH AN ALDEHYDE CHOSEN FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PARAFORMALDEHYDE, AND SHAPING AND HEATING TO CURE AT A TEMPERATURE OF FROM ABOUT 80 TO 90*C. FOR ABOUT 6 TO 27 HOURS.
References Cited (Backward Citations)
GB432143A
Cited
US2333754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |