US3590104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 0,0-dialkyl-0-phenyl phosphorothioates
Assignee: Velsicol Chemical LLC
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Filing: 1968-02-26
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Granted: 1971-06-29
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Expires: 1988-02-26
Abstract
Abstract A PROCESS FOR PREPARING AN O,O-DIALKYL-O-PHENYL-PHOSPHOROTHIOATE WHICH COMPRISES REACTING O,O-DIALKYL-CHLORO-PHOSPHOROTHIOATE WITH A SODIUM PHENOLATE HYDRATE IN THE PRESENCE OF AN AROMATIC HYDROCARBON SOLVENT AND AN ALKYLAMINE CATALYST WHILE REMOVING WATER AZEOTROPICALLY FROM THE REACTION MIXTURE, AND THEREAFTER RECOVERING THE DESIRED PRODUCT.
Inventors
- 👤 Delbert L Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:42
CPC Classifications
A; A01; A01N; A01N57/00; A01N57/10; A01N57/14; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/18
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |