US3030939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating spark-ignition combustion engine
Assignee: Standard Oil Co
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Filing: 1958-07-10
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Granted: 1962-04-24
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Expires: 1978-07-10
Abstract
No abstract record available.
Inventors
- 👤 Preston L Brandt
- 👤 Clifton N Sechrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10L1/1985
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A METHOD OF OPERATING A SPARK-IGNITION INTERNAL COMBUSTION ENGINE WHEREBY A SUBSTANTIALLY CONSTANT VOLUME OF SYNTHETIC LUBRICATING OIL IS MAINTAINED IN THE CRANK CASE OF THE ENGINE WHICH METHOD CONSISTS OF CHARGING AS THE FUEL TO THE COMBUSTION ZONE OF SAID ENGINE A GASOLINE CONTAINING A SYNTHETIC LUBRICATING OIL IN AN AMOUNT BETWEEN ABOUT 0.1 AND 3 VOLUME PERCENT AND HAVING IN THE CRANK CASE OF SAID ENGINE AS THE LUBRICATING OIL A SYNTHETIC LUBRICATING OIL SELECTED FROM THE CLASS CONSISTING OF (I) A POLYOXYALKYLENE DIOL HAVING A MOLECULAR WEIGHT BETWEEN 500 AND 3000 WHICH IS THE DIOL REACTION PRODUCT OF AN ALIPHATIC DIHYDROXY ALCOHOL AND A MIXTURE CONSISTING OF ETHYLENE OXIDE AND 1,2-PROPYLENE OXIDE, THE WEIGHT RATIO OF ETHYLENE OXIDE TO PROPYLENE OXIDE BEING FROM 50:50 TO 10:90 AND (II) ARYLETHERS OF POLYPROPYLENE GLYCOLS, WHICH GLYCOL HAS A MOLECULAR WEIGHT BETWEEN 500 AND 3000, SAID SYNTHETIC LUBRICATING OIL IN SAID GASOLINE AND SAID SYNTHETIC LUBRICATING OIL CHARGED TO SAID CRANK CASE BEING ESSENTIALLY IDENTICAL COMPOUNDS.
Claim 2
Independent Claim
166 words
A METHOD OF OPERATING A SPARK-IGNITION INTERNAL COMBUSTION ENGINE WHEREBY A SUBSTANTIALLY CONSTANT VOLUME OF SYNTHETIC LUBRICATING OIL IS MAINTAINED IN THE CRANK CASE OF THE ENGINE WHICH METHOD CONSISTS OF CHARGING AS THE FUEL TO THE COMBUSTION ZONE OF SAID ENGINE A GASOLINE CONTAINING A SYNTHETIC LUBRICATING OIL IN AN AMOUNT BETWEEN ABOUT 0.1 AND 3 VOLUME PERCENT AND HAVING IN THE CRANK CASE OF SAID ENGINE AS THE LUBRICATING OIL A SYNTHETIC LUBRICATING OIL SELECTED FROM THE CLASS CONSISTING OF (I) A POLYOXYALKYLENE DIOL HAVING A MOLECULAR WEIGHT BETWEEN 500 AND 3000 WHICH IS THE DIOL REACTION PRODUCT OF AN ALIPHATIC DIHYDROXY ALCOHOL AND A MIXTURE CONSISTING OF ETHYLENE OXIDE AND 1,2-PROPYLENE OXIDE, THE WEIGHT RATIO OF ETHYLENE OXIDE TO PROPYLENE OXIDE BEING FROM 50:50 TO 10:90 AND (II) ARYLETHERS OF POLYPROPYLENE GLYCOLS, WHICH GLYCOL HAS A MOLECULAR WEIGHT BETWEEN 500 AND 3000, SAID SYNTHETIC LUBRICATING OIL IN SAID GASOLINE AND SAID SYNTHETIC LUBRICATING OIL CHARGED TO SAID CRANK CASE BEING ESSENTIALLY IDENTICAL COMPOUNDS.
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) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |