US3795655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur-vulcanizable elastomer mixtures and oxidation-resistant vulcanizates thereof
Assignee: Covestro International SA
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Filing: 1972-01-28
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Granted: 1974-03-05
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Expires: 1992-01-28
Abstract
Abstract A SULFUR-VULCANIZABLE ELASTOMER MIXTURE CAPABLE OF FORMING VULCANIZATES, WHICH SUBSTANTIALLY RETAIN THEIR ELASTIC AND TELSILE PROPERTIES UPON PROLONGED EXPOSURE TO HIGH TEMPERATURE UNDER OXIDATIVE CONDTIONS, COMPRISING (A) A SULFUR-VULCANIZABLE ELASTOMER, (B) SULFUR, (C) A BIVALENT METAL OXIDE ACTIVATOR SYSTEM CONTAINING MAGNESIUM OXIDE AND ANOTHER BIVALENT METAL OXIDE, (D) TETRAC1-4-ALKYL THIURAM DISULFIDE AND (E) AN ANTIOXIDANT SYSTEM COMPRISING A MIXTURE OF POLYETHER POLYTHIOETHER AND ARYL AMINE.
Inventors
- 👤 Claire C Le
- 👤 J Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:30
CPC Classifications
C; C08; C08L; C08L21/00; C08K; C08K3/00; C08K3/02; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/005; C08K5/16; C08K5/17; C08K5/18; C08K5/36; C08K5/39; C08L81/00; C08L81/02; C08L9/00; C08L9/02; C08L9/04
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |