US3014940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of metal dithiophosphates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-11-02
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Granted: 1961-12-26
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Expires: 1979-11-02
Abstract
No abstract record available.
Inventors
- 👤 Charles S Lynch
- 👤 William E Lifson
- 👤 Richard F Finn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN THE PREPARATION OF A POLYVALENT METAL SALT OF A DIALKYL DITHIOPHOSPHORIC ACID BY THE REACTION OF AN ALIPHATIC ALCOHOL HAVING IN THE RANGE OF FROM 1 TO 16 CARBON ATOMS PER MOLECULE WITH PHOSPHORUS PENTASULFIDE IN A MOLE RATIO OF ABOUT 4 MOLES OF THE ALCOHOL PER MOLE OF PHOSPHORUS PENTASULFIDE TO FORM A DIALKYL DITHIOPHOSPHORIC ACID AND THEREAFTER CONVERTING THE SAID ACID TO AN ESSENTIALLY NEUTRAL SALT OF A POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE ALKALINE EARTH METALS, ZINC, LEAD, CADMIUM, COBALT, COOPER, AND NICKEL, THE IMPROVEMENT WHICH COMPRISES USING IN THE FIRST-NAMED REACTION A PHOSPHORUS PENTASULFIDE CONTAINING LESS THAN 27.6 WEIGHT PERCENT OF PHOSPHORUS, AND ADDING TO THE SAID DIALKYL DITHIOPHOSPHORIC ACID, PRIOR TO SAID CONVERSION TO SAID SALT, FROM 0.1 TO 3.0 WEIGHT PERCENT OF FREE SULFUR.
Claim 2
Dependent Claim
134 words
IN THE PREPARATION OF A POLYVALENT METAL SALT OF A DIALKYL DITHIOPHOSPHORIC ACID BY THE REACTION OF AN ALIPHATIC ALCOHOL HAVING IN THE RANGE OF FROM 1 TO 16 CARBON ATOMS PER MOLECULE WITH PHOSPHORUS PENTASULFIDE IN A MOLE RATIO OF ABOUT 4 MOLES OF THE ALCOHOL PER MOLE OF PHOSPHORUS PENTASULFIDE TO FORM A DIALKYL DITHIOPHOSPHORIC ACID AND THEREAFTER CONVERTING THE SAID ACID TO AN ESSENTIALLY NEUTRAL SALT OF A POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE ALKALINE EARTH METALS, ZINC, LEAD, CADMIUM, COBALT, COOPER, AND NICKEL, THE IMPROVEMENT WHICH COMPRISES USING IN THE FIRST-NAMED REACTION A PHOSPHORUS PENTASULFIDE CONTAINING LESS THAN 27.6 WEIGHT PERCENT OF PHOSPHORUS, AND ADDING TO THE SAID DIALKYL DITHIOPHOSPHORIC ACID, PRIOR TO SAID CONVERSION TO SAID SALT, FROM 0.1 TO 3.0 WEIGHT PERCENT OF FREE SULFUR.
References Cited (Backward Citations)
US2932614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |