US2668522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor gasoline additive
Assignee: Standard Oil Development Co
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Filing: 1951-11-29
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Granted: 1954-02-09
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 John E Hickok
- 👤 John A Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1616; C10L1/18; C10L1/182; C10L1/1822; C10L1/1824; C10L1/185; C10L1/1852
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
THE METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE IN MOIST, COOL TEMPERATURE CONDITIONS WHICH COMPRISES BURNING A GASOLINE FUEL IN THE SAID ENGINE CONTAINING ABOUT 0.5% OF SOLVENT OIL, 1.9% OF DIMETHYL CARBINOL OF AT LEAST 98% PURITY AND ABOUT 0.1% OF DIISOPROPYL ETHER, SAID SOLVENT OIL CONSISTING OF A LIQUID HYDROCARBON MIXTURE HAVING A KAURI-BUTANOL SOLVENT POWER ABOVE ABOUT 20. A 50% DISTILLATION POINT ABOVE 350* F., AT 10 MM. MERCURY PRESSURE, A SAYBOLT VISCOSITY AT 100* F., NOT ABOVE 450 SECONDS, AND AN API GRAVITY OF ABOUT 18 TO 28*.
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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |