US3706704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of c6-c10 olefin-maleic anhydride copolymers
Assignee: Gulf Research and Development Co
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Filing: 1970-11-27
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Granted: 1972-12-19
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Expires: 1990-11-27
Abstract
Abstract COPOLYMERS OF MALEIC ANHYDRIDE AND AN ALIPHATIC ALPHAOLEFIN HAVING FROM SIX TO TEN CARBON ATOMS ARE PREPARED IN A FINELY DIVIDED FILTERABLE SOLID FORM. MALEIC ANHYDRIDE IS COPOLYMERIZED WITH AT LEAST ONE OF THE OLEFINS IN THE PRESENCE OF A FREE-RADICAL CATALYST AND A SOLVENT FOR BOTH OF THE MONOMERS AND THE RESULTING COPOLYMER. THE COPOLYMER IS PRECIPITATED BY ADDING THE REACTION SOLUTION TO A SUFFICIENT AMOUNT OF A MONOHYDROXY ALIPHATIC ALCOHOL HAVING FROM ONE TO FOUR CARBON ATOMS.
Inventors
- 👤 Wililam J Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:58
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |