US2838557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alkali and alkaline earth metal salts of dithiophosphoric acid diesters
Assignee: Sinclair Refining Co
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Filing: 1956-03-28
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Granted: 1958-06-10
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Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Guy M Verley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:15
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A METHOD OF PREPARING THE ALKALI AND ALKALINE EARTH METAL SALTS OF DITHIOPHOSPHORIC ACID DIESTERS BY NEUTRALIZING THE ACID ESTER IN AN ESSENTIALLY ANHYDROUS MEDIUM, THE STEPS WHICH COMPRISE PARTIALLY NEUTRALIZING SAID ACID ESTER WITH ABOUT 0.1 TO 1.0 EQUIVALENT OF A CARBONATE OF A METAL SELECTED FROM THE ALKALI AND ALKALINE EARTH METALS, AND IN THE PRESENCE OF ABOUT 0.005 TO 0.2 PART BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALENE GLYCOLS OF UP TO ABOUT 300 MOLECULAR WEIGHT IN WHICH THE ALKALENE RADICAL CONTAINS 2 TO 4 CARBON ATOMS AND THE ETHERS THEREOF, FURTHER NEUTRALIZING THE ACID ESTER BY ADDING ABOUT 0.5 TO 1.5 EQUIVALENTS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF THE ALKALI AND ALKALINE EARTH METALS.
Claim 2
Dependent Claim
132 words
IN A METHOD OF PREPARING THE ALKALI AND ALKALINE EARTH METAL SALTS OF DITHIOPHOSPHORIC ACID DIESTERS BY NEUTRALIZING THE ACID ESTER IN AN ESSENTIALLY ANHYDROUS MEDIUM, THE STEPS WHICH COMPRISE PARTIALLY NEUTRALIZING SAID ACID ESTER WITH ABOUT 0.1 TO 1.0 EQUIVALENT OF A CARBONATE OF A METAL SELECTED FROM THE ALKALI AND ALKALINE EARTH METALS, AND IN THE PRESENCE OF ABOUT 0.005 TO 0.2 PART BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALENE GLYCOLS OF UP TO ABOUT 300 MOLECULAR WEIGHT IN WHICH THE ALKALENE RADICAL CONTAINS 2 TO 4 CARBON ATOMS AND THE ETHERS THEREOF, FURTHER NEUTRALIZING THE ACID ESTER BY ADDING ABOUT 0.5 TO 1.5 EQUIVALENTS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF THE ALKALI AND ALKALINE EARTH METALS.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |