US2926185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process for preparing phenyl dimethyl phosphates
Assignee: Ethyl Corp
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Filing: 1958-04-23
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Granted: 1960-02-23
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Expires: 1978-04-23
Abstract
No abstract record available.
Inventors
- 👤 Francis X Markley
- 👤 Harold D Orloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:22
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS OF PREPARING PHENYL DIMETHLY PHOSPHATES CHARACTERIZED BY CONCURRENTLY INTRODUCING SEPARATE PORTIONS OF (1) A PHENYL PHOSPHORODICHLORIDATE WHEREIN THE PHENYL GROUP CONTAINS UP TO 8 CARBON ATOMS AND UP TO ONE CHLORINE ATOM ATTACHED TO THE RING AND (2) A SOLUTION OF SODIUM METHOXIDE IN METHANOL INTO A REACTION ZONE MAINTAINED AT A TEMPERATURE OF ABOUT 20 TO ABOUT 70*C., THE RATE AT WHICH SAID PORTIONS ARE SO INTRODUCED BEING SUCH THAT THE PH OF THE RESULTANT REACTION MIXTURE IS BETWEEN 1 AND 8, AND REMOVING THE SODIUM CHLORIDE AND EXCESS METHANOL FROM THE REACTION MIXTURE ADJUSTED TO A PH OF FROM 4 TO 6.
Claim 2
Dependent Claim
106 words
A PROCESS OF PREPARING PHENYL DIMETHLY PHOSPHATES CHARACTERIZED BY CONCURRENTLY INTRODUCING SEPARATE PORTIONS OF (1) A PHENYL PHOSPHORODICHLORIDATE WHEREIN THE PHENYL GROUP CONTAINS UP TO 8 CARBON ATOMS AND UP TO ONE CHLORINE ATOM ATTACHED TO THE RING AND (2) A SOLUTION OF SODIUM METHOXIDE IN METHANOL INTO A REACTION ZONE MAINTAINED AT A TEMPERATURE OF ABOUT 20 TO ABOUT 70*C., THE RATE AT WHICH SAID PORTIONS ARE SO INTRODUCED BEING SUCH THAT THE PH OF THE RESULTANT REACTION MIXTURE IS BETWEEN 1 AND 8, AND REMOVING THE SODIUM CHLORIDE AND EXCESS METHANOL FROM THE REACTION MIXTURE ADJUSTED TO A PH OF FROM 4 TO 6.
References Cited (Backward Citations)
US2599515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |