Patent US2941945A successfully refreshed from Google Patents.
US2941945A
Expired / Lapsed
US
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Extreme pressure lubricants
Assignee: Standard Oil Co
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Filing: 1956-06-28
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Granted: 1960-06-21
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Morton Z Fainman
- 👤 Paul C Vienna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:57
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/08; C10M2201/00; C10M2201/04; C10M2201/043; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/40; C10M2207/404; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/085; C10M2219/086; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A METHOD OF INCREASING THE AMOUNT OF SOLUBLE SULFUR IN A PETROLEUM LUBRICATING OIL HAVING A VISCOSITY OF FROM ABOUT 50 SUS TO ABOUT 1500 SUS AT 100*F. TO IMPROVE THE EXTREME PRESSURE PROPERTIES THEREOF, WHICH METHOD COMPRISES DISSOLVING IN SAID OIL AN AMOUNT OF ELEMENTAL SULFUR GREATER THAN THE NORMAL SATURATION SOLUBILITY AMOUNT IN SAID OIL BY HEATING THE SAID OIL TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200*F. TO ABOUT 300*F. AND LOWER THAN THE TEMPERATURE AT WHICH SAID SULFUR WILL REACT WITH SAID OIL, SAID AMOUNT OF SAID SULFUR BEING ESSENTIALLY SOLUBEL WITHIN SAID TEMPERATURE RANGE, COOLING THE OIL AND SULFUR MIXTURE TO A TEMPERATURE LOWER THAN ABOUT 200*F., AND DISSOLVING IN THE COOLED OIL AND SULFUR MIXTURE AN OIL SOLUBLE ORGANIC SULFUR-CONTAINING MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC SULFIDES AND POLYSULFIDES, AROMATIC SULFIDES, DISULFIDES AND POLYSULFIDES, MERCAPTANTS, THIOPHENOLS AND SUBSTITUTED THIOPHENOLS, REDUCED CRUDE CONTAINING COMBINED SULFUR, SULFURIZED FATTY MATERIALS, SULFURIZED OLEFINS, AND SULFURIZED PETROLEUM STOCKS, AT A TEMPERATURE AT WHICH SAID SULFURCONTAINING MATERIAL IS STABLE AND IN SUFFICIENT AMOUNT TO MAINTAIN THE ADDED SULFUR IN SOLUTION.
Claim 2
Independent Claim
184 words
A METHOD OF INCREASING THE AMOUNT OF SOLUBLE SULFUR IN A PETROLEUM LUBRICATING OIL HAVING A VISCOSITY OF FROM ABOUT 50 SUS TO ABOUT 1500 SUS AT 100*F. TO IMPROVE THE EXTREME PRESSURE PROPERTIES THEREOF, WHICH METHOD COMPRISES DISSOLVING IN SAID OIL AN AMOUNT OF ELEMENTAL SULFUR GREATER THAN THE NORMAL SATURATION SOLUBILITY AMOUNT IN SAID OIL BY HEATING THE SAID OIL TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200*F. TO ABOUT 300*F. AND LOWER THAN THE TEMPERATURE AT WHICH SAID SULFUR WILL REACT WITH SAID OIL, SAID AMOUNT OF SAID SULFUR BEING ESSENTIALLY SOLUBEL WITHIN SAID TEMPERATURE RANGE, COOLING THE OIL AND SULFUR MIXTURE TO A TEMPERATURE LOWER THAN ABOUT 200*F., AND DISSOLVING IN THE COOLED OIL AND SULFUR MIXTURE AN OIL SOLUBLE ORGANIC SULFUR-CONTAINING MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC SULFIDES AND POLYSULFIDES, AROMATIC SULFIDES, DISULFIDES AND POLYSULFIDES, MERCAPTANTS, THIOPHENOLS AND SUBSTITUTED THIOPHENOLS, REDUCED CRUDE CONTAINING COMBINED SULFUR, SULFURIZED FATTY MATERIALS, SULFURIZED OLEFINS, AND SULFURIZED PETROLEUM STOCKS, AT A TEMPERATURE AT WHICH SAID SULFURCONTAINING MATERIAL IS STABLE AND IN SUFFICIENT AMOUNT TO MAINTAIN THE ADDED SULFUR IN SOLUTION.
References Cited (Backward Citations)
US2167439A
Cited
US2420280A
Cited
US2157379A
Cited
US2154628A
Cited
US2392891A
Cited
US2790773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |