US4440545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasohol having corrosion inhibiting properties
Assignee: Ethyl Corp
•
Filing: 1981-11-02
•
Granted: 1984-04-03
•
Expires: 2001-11-02
Abstract
Abstract Liquid fuels for use in internal combustion engines comprising (i) a major fraction of hydrocarbons boiling in the gasoline boiling range, (ii) a minor amount of ethanol, and (iii) a corrosion inhibiting amount of a hydrocarbyl succinic acid or anhydride having from about 8 to 30 carbon atoms.
Inventors
- 👤 Charles F. Weidig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/12; C10L1/1233; C10L1/125; C10L1/182; C10L1/1822; C10L1/1824; C10L1/188; C10L1/1881; C10L1/1883; C10L1/192; C10L1/198
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
A liquid fuel for use in internal combustion engines comprising a major amount of hydrocarbons boiling in the gasoline boiling range, a minor amount of ethanol, and a corrosion inhibiting amount of tetrapropenylsuccinic acid or anhydride.
Claim 2
Dependent Claim
36 words
A liquid fuel for use in internal combustion engines comprising a major amount of hydrocarbons boiling in the gasoline boiling range, a minor amount of ethanol, and a corrosion inhibiting amount of tetrapropenylsuccinic acid or anhydride.
Claim 3
Dependent Claim
14 words
The fuel of claim 1 wherein said ethanol is anhydrous or substantially anhydrous ethanol.
Claim 4
Dependent Claim
11 words
The fuel of claim 1 wherein said ethanol is hydrous ethanol.
Claim 5
Dependent Claim
16 words
The fuel of claim 3 wherein said ethanol contains up to about 5.0 volume percent water.
Claim 6
Dependent Claim
40 words
The fuel of claim 1 which comprises blending from about 70 to about 95 volume percent gasoline, from about 5 to about 30 volume percent hydrous ethanol and from about 1.0 to about 100 ppm of tetrapropenylsuccinic acid or anhydride.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |