Patent US4043470A successfully refreshed from Google Patents.
Patent US3644601A successfully refreshed from Google Patents.
US3644601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of isomer ratio in reaction products prepared by phosphorylation of enolate ions
Assignee: Wyeth Holdings LLC
•
Filing: 1969-05-07
•
Granted: 1972-02-22
•
Expires: 1989-05-07
Abstract
Abstract ENOLATE IONS ARE PHOSPHORYLATED IN THE PRESENCE OF A SOLVENT AND A STRONG BASE TO YIELD A PRODUCT MIXTURE CONTAINING TRANS AND CISISOMERS. CERTAIN UNIQUE COMBINATIONS OF SOLVENTS AND BASES PROVIDE REACTION PRODUCTS IN WHICH THE TRANS ISOMER PREDOMINATES WHILE OTHER COMBINATIONS PROVIDE REACTION PRODUCTS IN WHICH THE CIS ISOMER PREDOMINATES. SINCE ONE ISOMER OFTEN EXHIBITS SUPERIOR PESTICIDAL ACTIVITY WHEN COMPARED TO THE OTHER ISOMER, THE PROCESSES OF THIS INVENTION PROVIDE A CONVENIENT ROUTE FOR OBTAINING THE DESIRED ISOMER.
Inventors
- 👤 Bernard Miller
- 👤 Howard Margulies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4078; A; A01; A01N; A01N57/00; A01N57/02; C07F9/06; C07F9/08; C07F9/09; C07F9/113; C07F9/16; C07F9/165; C07F9/173; C07F9/30; C07F9/32; C07F9/3258; C07F9/327
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |