US3694384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redox polymers
Assignee: General Electric Co
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Filing: 1971-01-11
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Granted: 1972-09-26
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Expires: 1991-01-11
Abstract
Abstract REDOX OLYMERS, WHICH, IN THE OXIDIZED CATIONIC FORM, CONTAIN REPEATING UNITS OF THE FORMULA: -CH2-C6H4-CH2-(PYRIDINIUM-1,4-YLENE)-(PYRIDINIUM-4,1- YLENE)- ARE READILY REDUCED, EITHER CHEMICALLY OR ELECTRICALLY, AND CHANGE COLOR FROM COLORLESS TO INTENSE BLUE-VIOLET. THE REDUCED FORM IS READILY OXIDIZED WITH OXYGEN IN AIR OR DISSOLVED IN SOLUTION SO THAT IT IS USEFUL FOR DEOXYGENATING GASES OR LIQUIDS WITH THE COLOR CHANGE BEING A SELF-INDICATOR OF THE REDOX STATE OF THE POLYMER. THESE COMPOSITIONS CAN BE MADE SO THAT THEY ARE SOLUBLE OR INSOLUBLE IN AQUEOUS MEDIA AND FORM POLYELECTROLYTE COMPLEXES WITH CATION EXCHANGE RESINS.
Inventors
- 👤 Arnold Factor
- 👤 George E Heinsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:10
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0627; B; B01; B01J; B01J47/00; B01J47/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |