US2550406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricants
Assignee: Standard Oil Development Co
•
Filing: 1948-08-31
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Granted: 1951-04-24
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Expires: 1968-08-31
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2201/00; C10M2201/02; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/12; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A COMPOSITION CONSISTING ESSENTIALLY OF MINERAL BASE LUBRICATING OIL CONTAINING 1 TO 20 % BY WEIGHT, BASED ON THE TOTAL COMPSITION, OF A SULFURIZED AND PHOSPHORIZED ESTER OF AN ABIETIC COMPOUND ESTERIFIED WITH AN ALIPHATIC COMPOUND OF 12 TO 22 CARBON ATOMS, WHEREIN ONE OF SAID ESTERIFYING COMPOUNDS IS A CARBOXYLIC ACID AND THE OTHER IS AN ALCOHOL, SAID SULFERIZED AND PHOSPHORIZED ESTER BEING PREPARED BY FIRST COMBINING ABOUT 91 TO 97 PARTS BY WEIGHT OF THE ESTER WITH 3 TO 9 PARTS OF SULFUR AND HEATING TO A TEMPERATURE BETWEEN ABOUT 280* AND 450* F. FOR A PERIOD OF 1 TO 10 HOURS, AND THEREAFTER TREATING THE SULFERIZED PRODUCT WITH ABOUT 0.5% BY WEIGHT OF A PHOSPHORUS SULFIDE AT A TEMPERATURE BETWEEN ABOUT 150* AND 300* F. FOR A PERIOD OF 1 TO 24 HOURS.
Claim 2
Dependent Claim
136 words
A COMPOSITION CONSISTING ESSENTIALLY OF MINERAL BASE LUBRICATING OIL CONTAINING 1 TO 20 % BY WEIGHT, BASED ON THE TOTAL COMPSITION, OF A SULFURIZED AND PHOSPHORIZED ESTER OF AN ABIETIC COMPOUND ESTERIFIED WITH AN ALIPHATIC COMPOUND OF 12 TO 22 CARBON ATOMS, WHEREIN ONE OF SAID ESTERIFYING COMPOUNDS IS A CARBOXYLIC ACID AND THE OTHER IS AN ALCOHOL, SAID SULFERIZED AND PHOSPHORIZED ESTER BEING PREPARED BY FIRST COMBINING ABOUT 91 TO 97 PARTS BY WEIGHT OF THE ESTER WITH 3 TO 9 PARTS OF SULFUR AND HEATING TO A TEMPERATURE BETWEEN ABOUT 280* AND 450* F. FOR A PERIOD OF 1 TO 10 HOURS, AND THEREAFTER TREATING THE SULFERIZED PRODUCT WITH ABOUT 0.5% BY WEIGHT OF A PHOSPHORUS SULFIDE AT A TEMPERATURE BETWEEN ABOUT 150* AND 300* F. FOR A PERIOD OF 1 TO 24 HOURS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |