Patent US3749560A successfully refreshed from Google Patents.
US3749560A
Expired / Lapsed
US
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Gasoline compositions
Assignee: Ethyl Corp
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Filing: 1970-08-21
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Granted: 1973-07-31
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Expires: 1990-08-21
Abstract
Abstract GASOLINE COMPOSITIONS CONTAINING NORMALLY LIQUID NONAROMATIC OLEFIN HYDROCARBONS HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 350 TO ABOUT 1500; THE COMPPOSITION ARE CHARACTERIZED BY SUBSTANTIALLY REDUCING THE UNDERHEAD INTAKE VALVE DEPOSIT FORMATION WHEN USED AS FUELS IN A SPARK IGNITION, INTERNAL COMBUSTION ENGINE. PREFERRED OLEFIN HYDROCARBONS ARE THOSE PREPARED BY FRIEDEL-CRAFTS POLYMERIZATION OF A MIXTURE OF MONOOLEFINS WITH CARBON NUMBERS RANGING FROM ABOUT C12 AND HIGHER.
Inventors
- 👤 W Perilstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1616; C10L1/1625; C10L1/1633; C10L1/1641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |