US3658732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanized elastomeric compositions having improved resistance against air-oxidation and method for making same
Assignee: Covestro International SA
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Filing: 1969-10-10
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Granted: 1972-04-25
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Expires: 1989-10-10
Abstract
Abstract VULCANIZED ELASTOMERIC COMPOSITIONS HAVING IMPROVED RESISTANCE AGAINST AIR-OXIDATION ARE PREPARED BY: (A) REACTING (1) AN ETHYLENE/ALPHAOLEFIN/DIENE TERPOLYMER, WHEREIN THE DIENE IS SELECTED FROM THE GROUP CONSISTING OF 1,4-TRANS-HEXADIENE, 2-METHALLYL-5-NORBORNENE, 2-METHYLENE-5-NORBORNENE, 2-ETHYLIDENE-5-NORBORNENE, 6-METHYL-4,7,8,9-TETRAHYDROINDENE AND 5,6-DIMETHYL-4,7,8,9-TETRAHYDROINDENE, WITH (2) FROM ABOUT 0.01 TO 0.5% BY WEIGHT BASED ON SAID TERPOLYMER OF AN ORGANIC PEROXIDE; (B) ADMIXING THE REACTED TERPOLYMER WITH AN UNSATURATED ELASTOMER; AND (C) SUBJECTING THIS ADMIXTURE TO CONVENTIONAL VULCANIZING CONDITIONS.
Inventors
- 👤 Giuliano Ballini
- 👤 Luciano Baldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:49
CPC Classifications
C; C08; C08L; C08L21/00
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |