US4468233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor fuel containing tert-butyl ethers
Assignee: Veba Oel AG
•
Filing: 1982-04-28
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Granted: 1984-08-28
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Expires: 2002-04-28
Abstract
Abstract A motor fuel comprising 35-98% hydrocarbon-containing base and 2-65% by volume of an additive which comprises a mixture containing (a) 5-35% by volume of methyl tert-butyl ether; (b) 5-40% by volume of isopropyl tert-butyl ether; and (c) 5-40% by volume of sec-butyl tert-butyl ether, has a high octane number and reduces exhaust pollutants.
Inventors
- 👤 Hartmut Bruderreck
- 👤 Gunter Deininger
- 👤 Klaus Gottlieb
- 👤 Friedel-Heinrich Wehmeier
- 👤 Manfred Haselhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/02; C10L1/023
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A motor fuel containing tert-butyl ethers comprising 70-95% by volume of hydrocarbon-containing base and 5-30% by volume of an additive which comprises a mixture which contains 5-35% by volume of methyl-tert-butyl ether, 5-40% by volume of isopropyl tert-butyl ether and 5-40% by volume of sect-butyl tert-butyl ether.
Claim 2
Dependent Claim
47 words
A motor fuel containing tert-butyl ethers comprising 70-95% by volume of hydrocarbon-containing base and 5-30% by volume of an additive which comprises a mixture which contains 5-35% by volume of methyl-tert-butyl ether, 5-40% by volume of isopropyl tert-butyl ether and 5-40% by volume of sect-butyl tert-butyl ether.
Claim 3
Dependent Claim
16 words
The motor fuel of claim 1, wherein said additive comprises 10-30% by volume of said fuel.
Claim 4
Dependent Claim
27 words
The motor fuel of claim 1 wherein said additive contains methyl tert-butyl ether, isopropyl tert-butyl ether, and sec-butyl tert-butyl ether in a volume ratio of about 1:1:1.
Claim 5
Dependent Claim
57 words
The motor fuel of claim 1 wherein said additive additionally comprises at least one alcohol selected from the group consisting of 1-25% by volume of tert-butanol, 1-10% by volume of sec-butanol, 1-10% by volume of isopropanol and wherein the total proportion of said alcohols does not exceed 50% by volume, preferably up to 25%, of said additive.
Claim 6
Dependent Claim
23 words
The motor fuel of claim 4, wherein said additive comprises isopropyl tert-butyl ether and isopropanol in a volume ratio of 4:1 to 10:1.
Claim 7
Dependent Claim
23 words
The motor fuel of claim 4, wherein said additive comprises sec-butyl tert-butyl ether and sec-butanol in a volume ratio of 5:1 to 20:1.
References Cited (Backward Citations)
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Cited
US2132017A
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FR828020A
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FR829581A
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |