Patent US2498628A successfully refreshed from Google Patents.
US2498628A
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Lubricants and extreme pressure additives therefor
Assignee: Standard Oil Development Co
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Filing: 1946-11-08
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Granted: 1950-02-28
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Expires: 1966-11-08
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
- 👤 Jr Louis J Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:49
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2201/00; C10M2201/04; C10M2201/043; C10M2201/06; C10M2201/065; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/40; C10M2207/404; C10M2219/00; C10M2219/02; C10M2219/024; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/12; C10N; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN EXTREME PRESSURE LUBRICANT CONSISTING ESSENTIALLY OF ABOUT 80 TO 99% OF MINERAL BASE LUBRICATING OIL AND 1 TO 20% OF AN EXTREME PRESSURE ADDITIVE, SAID ADDITIVE CONSISTING OF ABOUT 100 PARTS BY WEIGHT OF A SULFURIZED AND PHOSPHORIZED FATTY MATERIAL AND ABOUT 4 PARTS OF A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF TRICRESYL PHOSPHITE AND TRICTESYL PHOSPHATE, AND SULFURIZED AND PHOSPHORIZED FATTY MATERIAL BEING PREPARED BY FIRST ADDING ABOUT 3 TO 12% BY WEIGHT OF SULFUR TO SAID FATTY MATERIAL AND HEATING THE MIXTURE TO A TEMPERATURE OF ABOUT 330* TO 400*F. FOR A SUFFICIENT TIME SUBSTANTIALLY TO COMPLETE THE REACTION AND THEREAFTER REACTING SAID SULFURIZED MATERIAL WITH ABOUT 0.4 TO 0.5% OF P4S3 AT A TEMPERATURE OF ABOUT 210* TO 230*F. FOR ABOUT 5 TO 8 HOURS.
Claim 2
Dependent Claim
130 words
AN EXTREME PRESSURE LUBRICANT CONSISTING ESSENTIALLY OF ABOUT 80 TO 99% OF MINERAL BASE LUBRICATING OIL AND 1 TO 20% OF AN EXTREME PRESSURE ADDITIVE, SAID ADDITIVE CONSISTING OF ABOUT 100 PARTS BY WEIGHT OF A SULFURIZED AND PHOSPHORIZED FATTY MATERIAL AND ABOUT 4 PARTS OF A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF TRICRESYL PHOSPHITE AND TRICTESYL PHOSPHATE, AND SULFURIZED AND PHOSPHORIZED FATTY MATERIAL BEING PREPARED BY FIRST ADDING ABOUT 3 TO 12% BY WEIGHT OF SULFUR TO SAID FATTY MATERIAL AND HEATING THE MIXTURE TO A TEMPERATURE OF ABOUT 330* TO 400*F. FOR A SUFFICIENT TIME SUBSTANTIALLY TO COMPLETE THE REACTION AND THEREAFTER REACTING SAID SULFURIZED MATERIAL WITH ABOUT 0.4 TO 0.5% OF P4S3 AT A TEMPERATURE OF ABOUT 210* TO 230*F. FOR ABOUT 5 TO 8 HOURS.
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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |