US3700637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diene-nitrile rubbers
Assignee: Shell USA Inc
•
Filing: 1970-05-08
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Granted: 1972-10-24
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Expires: 1990-05-08
Abstract
Abstract SUBSTANTIALLY ALTERNATING COPOLYMERS OF CONJUGATED DIENES AND UNSATURATED NITRILES, AND THEIR HYDROGENATED DERIVATIVES, ARE USEFUL RUBBERS HAVING HIGH STRENGTH WITHOUT VULCANIZATION.
Inventors
- 👤 Albert M T Finch Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:37
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08C; C08C19/00; C08C19/02; C08F236/00; C08F236/02; C08F236/04
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |