Patent US3576762A successfully refreshed from Google Patents.
US3576762A
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Catalysts of modified basic trivalent metal acetates
Assignee: IFP Energies nouvelles
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Filing: 1968-07-02
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Granted: 1971-04-27
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Expires: 1988-07-02
Abstract
Abstract THERE ARE PROVIDED POLYMERIZATION CATALYSTS ESPECIALLY USEFUL FOR THE POLYMERIZATION OF CYCLIC ETHERS. THESE CATALYSTS HAVE THE FORMULA M6+2NO7+3N(OH)2A2 WHEREIN A IS A CARBOXYLIC ACID MONOVALENT RADICAL, M IS A TRIVALENT METAL AND N IS A NUMBER COMPRISED BETWEEN 0 AND 10. THESE CATALYSTS ARE PRODUCED BY HYDROLYZING A BASIC TRIVALENT METAL CARBOXYLATE, E.G. BASIC IRON (III) ACETATE, AND THEN DEHYDRATING THE RESULTANT HYDROLYZED CARBOXYLATE. ALUMINUM ALCOHOLATE OR PHENATE MAY BE ADDED THERETO.
Inventors
- 👤 Francoise Maguet-Martin
- 👤 Maseh Osgan
- 👤 Philippe Teyssie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:44
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266; C07; C07C; C07C51/00; C07C51/41; C07C53/00; C07C53/08; C07C53/10; C08G65/269
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |