US3652652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-methallyllevulinates and preparation thereof
Assignee: Rhone Poulenc SA
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Filing: 1969-04-22
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Granted: 1972-03-28
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Expires: 1989-04-22
Abstract
Abstract THE INVENTION PROVIDES ALKYL 3-METHALLYLLEVULINATES USEFUL AS INTERMEDIATES IN THE PREPARATION OF CHRYSANTHEMIC ACID AND A PROCESS FOR THEIR PRODUCTION BY REACTION OF AN ALKYL ENOL ETHER OF AN ALKYL LEVULINATE WITH METHALLYL ALCOHOL AND HEATING.
Inventors
- 👤 Marc Julia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:21
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/65; C07C69/74
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |