US3723271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 4,5-epoxy-2-pentenal from cyclopentadiene using actiniclight
Assignee: Firmenich SA
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Filing: 1971-06-21
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Granted: 1973-03-27
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Expires: 1991-06-21
Abstract
Abstract 4,5-EXPXY-2-PENTEN-1-AL, WHICH IS USEFUL AS AN INTERMEDIATE IN VARIOUS ORGANIC SYNTHESES, IS DISCLOSED TOGETHER WITH A PROCESS FOR ITS PREPARATION WHICH COMPRISES OXIDIZING CYCLOPENTADIENE BY MEANS OF SINGLET OXYGEN.
Inventors
- 👤 Elte K Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:05
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C45/00; C07C45/56; C07C45/57; C07C45/58; C07D; C07D303/00; C07D303/02; C07D303/04; C07D303/12; C07D303/32; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; C08G63/00; C08G63/91; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; Y; Y10; Y10S; Y10S204/00; Y10S204/90; Y10S204/902; Y10S204/903; Y10S204/904; Y10S204/908; Y10S204/911; Y10S204/912
Claims Analysis
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |