US2928864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of mixed phosphorothioate esters
Assignee: Dow Chemical Co
•
Filing: 1958-01-08
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Granted: 1960-03-15
•
Expires: 1978-01-08
Abstract
No abstract record available.
Inventors
- 👤 Edward J Tabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR THE MANUFACTURE OF A MIXTURE PHOSPHOROTHIOATE ESTER WHICH COMPRISES REACTING IN THE ABSENCE OF A CATALYST AND AT A TEMPERATURE OF FROM 40* TO 70*C. ONE MOLECULAR PROPORTION OF AN O,O-DI(LOWERALKYL) PHOSPHOROCHLORIDOTHIOATE WITH A MIXTURE COMPRISING AT LEAST ONE MOLECULAR PORTION OF EACH OF AN ALKALI METAL HYDROXIDE AND A PHENOLIC COMPOUND, SAID ALKALI METAL HYDROXIDE BEING EMPLOYED IN THE FORM OF AN AQUEOUS SOLUTION CONTAINING AT LEAST 10 PERCENT BY WEIGHT OF THE ALKALI METAL HYDROXIDE, AND SAID PHENOIC COMPOUND HAVING THE FORMULA ROH WHEREIN R REPRESENTS A PHENYL RADICAL WHOSE NUCLEUS MAY BE SUBSTITUTED WITH A RADICAL SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE, LOWER ALKYL, LOWER ALKOXY, CYCLHEXYL, BENZYL AND PHENYL.
Claim 2
Independent Claim
118 words
A METHOD FOR THE MANUFACTURE OF A MIXTURE PHOSPHOROTHIOATE ESTER WHICH COMPRISES REACTING IN THE ABSENCE OF A CATALYST AND AT A TEMPERATURE OF FROM 40* TO 70*C. ONE MOLECULAR PROPORTION OF AN O,O-DI(LOWERALKYL) PHOSPHOROCHLORIDOTHIOATE WITH A MIXTURE COMPRISING AT LEAST ONE MOLECULAR PORTION OF EACH OF AN ALKALI METAL HYDROXIDE AND A PHENOLIC COMPOUND, SAID ALKALI METAL HYDROXIDE BEING EMPLOYED IN THE FORM OF AN AQUEOUS SOLUTION CONTAINING AT LEAST 10 PERCENT BY WEIGHT OF THE ALKALI METAL HYDROXIDE, AND SAID PHENOIC COMPOUND HAVING THE FORMULA ROH WHEREIN R REPRESENTS A PHENYL RADICAL WHOSE NUCLEUS MAY BE SUBSTITUTED WITH A RADICAL SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE, LOWER ALKYL, LOWER ALKOXY, CYCLHEXYL, BENZYL AND PHENYL.
References Cited (Backward Citations)
US2692891A
Cited
US2761806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |