US3622652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epdm polymers modified by graft polymerization
Assignee: Goodrich Corp
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Filing: 1967-12-19
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Granted: 1971-11-23
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Expires: 1987-12-19
Abstract
Abstract Alkyl acrylates and methacrylates are graft polymerized onto ethylene-propylene-diene rubbery elastomers as a backbone. The graft polymers are sulfur curable and have superior abrasion resistance compared to nongrafted ethylene-propylene-diene elastomers.
Inventors
- 👤 Parviz Hamed
- 👤 Everett T Mcdonel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:22
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |