US2976239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant composition containing noncorrosive sulfurized terpenes
Assignee: Standard Oil Co
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Filing: 1958-12-18
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Granted: 1961-03-21
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Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Albert R Sabol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:46
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/04; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/02; C10M2219/022; C10M2223/00; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10M2225/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A LUBRICANT COMPOSITION SUBSTANTIALLY NON-CORROSIVE TO SILVER COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND FROM ABOUT 0.01% TO ABOUT 10% OF A SULFURIZED TERPENE SUBSTANTIALLY NON-CORROSIVE TO SILVER, OBTAINED BY THE METHOD COMPRISING TREATING A SULFURIZED TERPENE, NORMALLY CORROSIVE TO SILVER, WITH FROM ABOUT 20% TO ABOUT 30% OF AN ALKANE MONOBASIS CARBOXYLIC ACID, CONTAINING FROM 1 TO ABOUT 4 CARBON ATOMS IN THE ALKYL GROUP, AT A TEMPERATURE OF FROM ABOUT 32*F. TO ABOUT 40*F. WHILE BUBBLING ANHYDROUS HC1 THROUGH THE REACTION MIXTURE, MAINTAINING THE ACID-TREATED SULFURIZED TERPENE AT A TEMPERATURE OF FROM ABOUT 32*F. TO ABOUT 40*F. FOR A PERIOD OF FROM ABOUT 3 TO ABOUT 5 HOURS, AND WASHING THE COOLED REACTION MIXTURE WITH A DILUTE ALKANE ALCOHOL SOLUTION TO REMOVE THE ALKANE MONOBASIS CARBOXYLIC ACID, AND HEATING THE WASHED PRODUCT AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 220*F.
Claim 2
Dependent Claim
146 words
A LUBRICANT COMPOSITION SUBSTANTIALLY NON-CORROSIVE TO SILVER COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND FROM ABOUT 0.01% TO ABOUT 10% OF A SULFURIZED TERPENE SUBSTANTIALLY NON-CORROSIVE TO SILVER, OBTAINED BY THE METHOD COMPRISING TREATING A SULFURIZED TERPENE, NORMALLY CORROSIVE TO SILVER, WITH FROM ABOUT 20% TO ABOUT 30% OF AN ALKANE MONOBASIS CARBOXYLIC ACID, CONTAINING FROM 1 TO ABOUT 4 CARBON ATOMS IN THE ALKYL GROUP, AT A TEMPERATURE OF FROM ABOUT 32*F. TO ABOUT 40*F. WHILE BUBBLING ANHYDROUS HC1 THROUGH THE REACTION MIXTURE, MAINTAINING THE ACID-TREATED SULFURIZED TERPENE AT A TEMPERATURE OF FROM ABOUT 32*F. TO ABOUT 40*F. FOR A PERIOD OF FROM ABOUT 3 TO ABOUT 5 HOURS, AND WASHING THE COOLED REACTION MIXTURE WITH A DILUTE ALKANE ALCOHOL SOLUTION TO REMOVE THE ALKANE MONOBASIS CARBOXYLIC ACID, AND HEATING THE WASHED PRODUCT AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 220*F.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |