Patent US3658743A successfully refreshed from Google Patents.
US3658743A
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US
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Stabilization of unsaturated hydrocarbon elastomers by synergistic combination of a phenolic compound an organic sulfide or thioester and an epoxide or phosphite ester
Assignee: Uniroyal Chemical Co Inc
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Filing: 1970-04-30
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Granted: 1972-04-25
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Expires: 1990-04-30
Abstract
Abstract AN EXAMPLE IS ETHYLENE-PROPYLENE-DICYCLOPENTADIENE TERPOLYMER RUBBER STABILIZED WITH (A) 4,4''-ISOPROPYLIDENE BIS PHENOL, (B) DILAURYL THIODIPROPIONATE, AND (C) EPOXIDIZED SOYBEAN OIL. (A) A PHENOL; (B) AN ORGANIC SULFIDE OR THIOESTER; AND (C) AN EPOXIDE OR PHOSPHITE ESTER. HYDROCARBON ELASTOMERS OF LOW UNSATURATION (E.G., EPDM, BUTYL RUBBER) OR HIGH UNSATURATION (E.G., SBR) ARE STABILIZED AGAINST OXIDATION BY THE USE OF A TERNARY SYNERGISTIC COMBINATION OF:
Inventors
- 👤 Edward M Bevilacqua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/04; C08K5/13; C08K5/15; C08K5/151; C08K5/1515; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
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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 |