US3629172A
Expired / Lapsed
US
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Elastomers from high-vinyl conjugated diene polymers
Assignee: Phillips Petroleum Co
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Filing: 1969-05-12
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Granted: 1971-12-21
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Expires: 1989-05-12
Abstract
Abstract HYDROGENATION OF HIGH-VINYL TELECHELIC POLYMERS SUBSTANTIALLY REDUCES THE NUMBER OF OLEFINIC DOUBLE BONDS AND YET MAINTAINS A SUBSTANTIALLY LIQUID MATERIAL. TERMINATING WITH ISOCYANATE END ROUPS AND CURING OR COUPLING WITH POLYFIUNCTIONAL AGENTS RESULTS IN VOVEL PRODUCTS HAVING HIGH RESISTANCE TO OXIDATION, WEATHERING, AND CRACKING.
Inventors
- 👤 Faber B Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08G18/6208; C08C; C08C19/00; C08C19/02; C08C19/30; C08G18/08; C08G18/10
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |