US3748305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acetylenes and phenols
Assignee: General Electric Co
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Filing: 1971-07-29
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Granted: 1973-07-24
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Expires: 1991-07-29
Abstract
Abstract DIPROPARGYL ETHERS OF DIHYDRIC PHENOLS ARE READILY COPOLYMERIZED WITH 2,6-DISUBSTITUTED PHENOLS BY AN OXIDATIVE COUPLING PROCESS. DIACETYLENIC ALKANES ARE BORDERLINE IN THEIR ABILITY TO BE SO COPOLYMERIZED. OTHER DIACETYLENIC COMPOUNDS CAN BE COPOLYMERIZED PROVIDING THE DIPROPARGYL ETHER IS ALSO PRESENT. THESE COPOLYMERS ARE READILY SOLUBLE IN ORGANIC SOLVENTS AND CAN THEREFORE BE USED TO PRODUCE COATINGS WHICH ARE PHOTOSENSITIVE AND ALSO CAN BE THERMALLY DECOMPOSED INTO CARBON OBJECTS. THE POLYMERS ARE ALSO USEFUL AS MATRICES FOR BINDING CARBON FIBERS INTO FABRICATED ARTICLES.
Inventors
- 👤 D White
- 👤 H Klopfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44; C08G2650/00; C08G2650/28; C08G2650/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |