Patent US3030304A successfully refreshed from Google Patents.
US3030304A
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US
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Lubricating compositions
Assignee: Castrol Ltd
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Filing: 1959-02-06
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Granted: 1962-04-17
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Expires: 1979-02-06
Abstract
No abstract record available.
Inventors
- 👤 Elliott John Scotchford
- 👤 Edwards Eric Descamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:59
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/024; C10M2211/06; C10M2211/08; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/14; C10M2215/20; C10M2215/202; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A LUBRICATING COMPOSITION CONSITING ESSENTIALLY OF A MAJOR PROPORTION OF MINERAL OIL HAVING INCORPORATED THEREIN A MINOR PROPORTION OF A CHLORINE AND SULPHUR-CONTAINING ADDITIVE TO PROVIDE IN THE COMPOSITION BETWEEN 0.5 AND 4% BY WEIGHT OF CLORINE AND BETWEEN 0.3 AND 2% BY WEIGHT OF SULPHUR TOGETHER WITH A MINOR PROPORTION OF A DIALKYL PHOSPHITE HAVING A TOTAL AMOUNT OF FROM 4 TO 24 CARBON ATOMS IN THE ALKYL GROUP TO PROVIDE BETWEEN 0.1 AND 0.5% BY WEIGHT OF PHOSPHORUS, TO THEREBY CONFER ON THE COMPOSITION EXTREME PRESSURE PROPERTIES; SAID CHLORINE AND SULPHUR CONTAINING-ADDITIVE BEING SELECTED FROM THE GROUP CONSISTING OF (1) A CHLORINATED ALIPHATIC DISULPHIDE AND (2) A COMBINATION OF A CHLORINE-BEARING SULPHUR-FREE HYDROCARBON HAVING A BOILING POINT AND DECOMPOSITION TEMPERATURE NOT LESS THAN 160*C. WITH A SULPHUR-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC DISULPHIDES, ARYL-SUBSTITUTED ALIPHATIC DISULPHIDES, AND CHLORINATED ARYL-SUBSTITUTED ALKIPHATIC DISULPHIDES, WHICH SULPHUR-CONTAINING COMPOUND IS SUBSTANTIALLY NON-REACTIVE TO IRON AND COPPER AT 100*C.
Claim 2
Dependent Claim
158 words
A LUBRICATING COMPOSITION CONSITING ESSENTIALLY OF A MAJOR PROPORTION OF MINERAL OIL HAVING INCORPORATED THEREIN A MINOR PROPORTION OF A CHLORINE AND SULPHUR-CONTAINING ADDITIVE TO PROVIDE IN THE COMPOSITION BETWEEN 0.5 AND 4% BY WEIGHT OF CLORINE AND BETWEEN 0.3 AND 2% BY WEIGHT OF SULPHUR TOGETHER WITH A MINOR PROPORTION OF A DIALKYL PHOSPHITE HAVING A TOTAL AMOUNT OF FROM 4 TO 24 CARBON ATOMS IN THE ALKYL GROUP TO PROVIDE BETWEEN 0.1 AND 0.5% BY WEIGHT OF PHOSPHORUS, TO THEREBY CONFER ON THE COMPOSITION EXTREME PRESSURE PROPERTIES; SAID CHLORINE AND SULPHUR CONTAINING-ADDITIVE BEING SELECTED FROM THE GROUP CONSISTING OF (1) A CHLORINATED ALIPHATIC DISULPHIDE AND (2) A COMBINATION OF A CHLORINE-BEARING SULPHUR-FREE HYDROCARBON HAVING A BOILING POINT AND DECOMPOSITION TEMPERATURE NOT LESS THAN 160*C. WITH A SULPHUR-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC DISULPHIDES, ARYL-SUBSTITUTED ALIPHATIC DISULPHIDES, AND CHLORINATED ARYL-SUBSTITUTED ALKIPHATIC DISULPHIDES, WHICH SULPHUR-CONTAINING COMPOUND IS SUBSTANTIALLY NON-REACTIVE TO IRON AND COPPER AT 100*C.
References Cited (Backward Citations)
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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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |