Patent US3836576A successfully refreshed from Google Patents.
US3836576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the transesterification of unsaturated esters
Assignee: Rhone Progil SA
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Filing: 1973-04-23
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Granted: 1974-09-17
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Expires: 1993-04-23
Abstract
Abstract A PROCESS FOR THE TRANSESTERIFICATION WITH AN ALCOHOL OR ALCOHOLS CONTAINING 3-22 CARBON ATOMS OF A METHACRYLIC ACID ESTER FORMED OF AN ALCOHOL HAVING A LOWER BOILING POINT THAN THE ABOVE ALCOHOL, AND WHEREIN THE TRANSESTERIFICATION REACTION IS CARRIED OUT IN THE PRESENCE OF A TITANIUM ALCOHOLATE AS A CATALYST AND DINAPHTHYL PHENYLENE DIAMINE AS A POLYMERIZATION INHIBITOR, IN WHICH THE REACTION IS CARRIED OUT WITH OR WITHOUT BUBBLING AIR THROUGH THE REACTION MIXTURE, AND REMOVING THE DISPLACED ALCOHOL FROM THE REACTION MIXTURE, AS BY DISTILLATION.
Inventors
- 👤 C Falize
- 👤 A Bouniot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54; C07C67/00; C07C67/03
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |