Patent US2139487A successfully refreshed from Google Patents.
US3574792A
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Synthetic rubber composition
Assignee: Eneos Corp
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Filing: 1968-08-15
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Granted: 1971-04-13
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Expires: 1988-08-15
Abstract
Abstract A SYNTHETIC RUBBER COMPOSITION HAVING IMPROVED TACKINESS WHICH COMPRISES (1) SYNTHETIC RUBBER AND AN ADDITION PRODUCT OF UNSATURATED ACID OR ANHYDRIDE THEREOF AND A HYDROCARBON RESIN OBTAINED BY POLYMERIZING A FRACTION BOILINGING WITHIN THE RANGE OF FROM 20*C TO 280*C. AND CONTAINING UNSATURATED HYDROCARBONS, SAID FRACTION BEING A BY-PRODUCT OBTAINED IN THE CRACKING OF PETROLEUM OIL TO PRODUCE OLEFINS, OR (II) A CYNTHETIC RUBBER AND AN ESTERIFIED PRODUCT OF SAID ADDITION PRODUCT.
Inventors
- 👤 Hideo Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:04
CPC Classifications
C; C08; C08L; C08L21/00
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |