US2875189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkaline earth salts of phosphorus sulfide-hydrocarbon reaction products
Assignee: Standard Oil Co
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Filing: 1957-05-31
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Granted: 1959-02-24
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Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Albert R Sabol
- 👤 Robert E Karll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:10
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN THE METHOD OF PREPARING AN OIL-SOLUBLE DETERGENTTYPE LUBRICANT ADDITIVE WHICH COMPRISES REACTING A REACTANT CONSISTING OF A HYDROCARBON, HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 150, WITH FROM ABOUT 1% TO ABOUT 50% OF A PHOSPHORUS SULFIDE AT A TEMPERATURE OF FROM ABOUT 200*F. TO ABOUT 600*F., HYDROLYZING THE RESULTANT REACTION PRODUCT AT A TEMPERATURE OF FROM ABOUT 220*F. TO ABOUT 500*F., AND NEUTRALIZING THE HYDROLYZED REACTION PRODUCT WITH A BASIC ALKALINE EARTH COMPOUND, THE IMPROVEMENT COMPRISING OXIDIZING THE UNNEUTRALIZED HYDROLYZED REACTION PRODUCT WITH FROM ABOUT 2% TO ABOUT 10% HYDROGEN PEROXIDE AT A TEMPERATURE OF FROM ABOUT 70*F. TO ABOUT 80*F. FOR ABOUT 2 TO 4 HOURS, RAISING THE TEMPERATURE TO ABOUT 212*F. TO 220*F. TO REMOVE THE WATER OF REACTION, AND NEUTRALIZING THE RESULTANT OXIDIZED HYDROLYZED REACTION PRODUCT WITH A BASIC ALKALINE EARTH COMPOUND.
Claim 2
Dependent Claim
138 words
IN THE METHOD OF PREPARING AN OIL-SOLUBLE DETERGENTTYPE LUBRICANT ADDITIVE WHICH COMPRISES REACTING A REACTANT CONSISTING OF A HYDROCARBON, HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 150, WITH FROM ABOUT 1% TO ABOUT 50% OF A PHOSPHORUS SULFIDE AT A TEMPERATURE OF FROM ABOUT 200*F. TO ABOUT 600*F., HYDROLYZING THE RESULTANT REACTION PRODUCT AT A TEMPERATURE OF FROM ABOUT 220*F. TO ABOUT 500*F., AND NEUTRALIZING THE HYDROLYZED REACTION PRODUCT WITH A BASIC ALKALINE EARTH COMPOUND, THE IMPROVEMENT COMPRISING OXIDIZING THE UNNEUTRALIZED HYDROLYZED REACTION PRODUCT WITH FROM ABOUT 2% TO ABOUT 10% HYDROGEN PEROXIDE AT A TEMPERATURE OF FROM ABOUT 70*F. TO ABOUT 80*F. FOR ABOUT 2 TO 4 HOURS, RAISING THE TEMPERATURE TO ABOUT 212*F. TO 220*F. TO REMOVE THE WATER OF REACTION, AND NEUTRALIZING THE RESULTANT OXIDIZED HYDROLYZED REACTION PRODUCT WITH A BASIC ALKALINE EARTH COMPOUND.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |