US3136807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high purity trialkyl trithiophosphates
Assignee: Phillips Petroleum Co
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Filing: 1961-12-18
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Granted: 1964-06-09
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
- 👤 James R Slagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:12
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17; C07F9/201; C07F9/202
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS FOR PREPARING TRIALKYL TRITHIOPHOSPHATES COMPRISING REACTING ALL ALKYL MERCAPTAN WITH A PHOSPHOROUS TRIHALIDE TO FORM A TRIALKYL TRITHIOPHOSPHITE, OXIDIZING THE REACTION MIXTURE AT A TEMPERATURE RANGING FROM ABOUT 200 TO ABOUT 300*F. TO FORM THE TRIALKYL TRITHIOPHOSPHATE, AND RECOVERING SAID TRITHIOPHOSPHATE AS A PRODUCT OF THE PROCESS, THE IMPROVEMENT FOR INCREASING THE PURITY OF SAID PRODUCT WHICH COMPRISES CARRYING OUT SAID OXIDATION STEPWISE BY FIRST PARTIALLY OXIDIZING SAID REACTION MIXTURE WITH AIR TO ABOUT 80% PHOSPHATE AND THEN COMPLETING SAID OXIDATON TO ABOUT 95% PHOSPHATE WITH H2O2.
Claim 2
Dependent Claim
90 words
IN A PROCESS FOR PREPARING TRIALKYL TRITHIOPHOSPHATES COMPRISING REACTING ALL ALKYL MERCAPTAN WITH A PHOSPHOROUS TRIHALIDE TO FORM A TRIALKYL TRITHIOPHOSPHITE, OXIDIZING THE REACTION MIXTURE AT A TEMPERATURE RANGING FROM ABOUT 200 TO ABOUT 300*F. TO FORM THE TRIALKYL TRITHIOPHOSPHATE, AND RECOVERING SAID TRITHIOPHOSPHATE AS A PRODUCT OF THE PROCESS, THE IMPROVEMENT FOR INCREASING THE PURITY OF SAID PRODUCT WHICH COMPRISES CARRYING OUT SAID OXIDATION STEPWISE BY FIRST PARTIALLY OXIDIZING SAID REACTION MIXTURE WITH AIR TO ABOUT 80% PHOSPHATE AND THEN COMPLETING SAID OXIDATON TO ABOUT 95% PHOSPHATE WITH H2O2.
References Cited (Backward Citations)
US2943107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |