US3135714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of a monovinyl ether of a clycol and diethyl ester of fumaric acid and vulcanizates thereof
Assignee: Dow Chemical Co
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Filing: 1960-10-24
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Granted: 1964-06-02
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Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 George B Sterling
- 👤 Robert L Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F16/00; C08F16/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A VULCANIZED SYNTHETIC RUBBER MADE BY COMPOUNDING TOGETHER A COPOLYMER OF THE MONOVINLY ETHER OF DIETHYLENE GLYCOL AND THE DIETHYL ESTER OF FUMARIC ACID, THERE BEING PRESENT IN THE COPOLYMER IN POLYMERIZED FORM ABOUT 40 PERCENT TO ABOUT 60 PERCENT OF THE MONOVINYL ETHER AND ABOUT 60 PERCENT TO ABOUT 40 PERCENT OF THE DIETHYL ESTER, RUBBER-VULCANIZING AGENTS, AND CARBON BLACK, AND HEATING THE RESULTING COMPOSITION AT CURING TEMPERATURE UNTIL THE COMPOUNDS IS SUBSTANTIALLY VULCANIZED.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |