US4153425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ω-Disubstituted amino alkanoic acid-N-amides as fuel additives
Assignee: BASF SE
•
Filing: 1976-06-21
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Granted: 1979-05-08
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Expires: 1996-06-21
Abstract
Abstract The novel compounds ω-N-disubstituted aminoalkanoic acid N'-amides of the formula ##STR1## in which R 1 , R 2 , R 3 and R 4 are identical or different and denote branched-chain or straight-chain alkyl radicals of from 7 to 20 carbon atoms, R 2 and R 4 may also denote a preferably mononuclear aralkyl or aryl radical and n denotes an integer of from 3 to 5, the total number of carbon atoms in the radicals R 1 to R 2 and in R 3 and R 4 being at least 16, are added in small quantities to gasoline and effect cleaning of the carburetor and obviate the formation of deposits on the valves.
Inventors
- 👤 Heinz Graefje
- 👤 Guenther Nottes
- 👤 Herbert Mueller
- 👤 Guenther Daumiller
- 👤 Herwig Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:07
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A composition of matter comprising predominantly gasoline for Otto cycle engines and an amount effective for cleaning Otto cycle engine carburetors of an ω-N-disubstituted aminoalkanoic acid N'-diamide of formula ##STR3## in which each of R 1 , R 2 , R 3 and R 4 represents branched-chain or straight-chain alkyl of from 7 to 20 carbon atoms, R 2 and R 4 may also denote phenyl, alkyl-substituted phenyl and benzyl, the total number of carbon atoms in R 1 and R 2 and in R 3 and R 4 being at least 16 in each case, and n is a number from 3 to 5.
Claim 2
Dependent Claim
105 words
A composition of matter comprising predominantly gasoline for Otto cycle engines and an amount effective for cleaning Otto cycle engine carburetors of an ω-N-disubstituted aminoalkanoic acid N'-diamide of formula ##STR3## in which each of R 1 , R 2 , R 3 and R 4 represents branched-chain or straight-chain alkyl of from 7 to 20 carbon atoms, R 2 and R 4 may also denote phenyl, alkyl-substituted phenyl and benzyl, the total number of carbon atoms in R 1 and R 2 and in R 3 and R 4 being at least 16 in each case, and n is a number from 3 to 5.
Claim 3
Dependent Claim
34 words
A composition of matter as set forth in claim 1 and comprising gasoline with a content of from about 10 to 2,000 ppm by weight of an ω-N-disubstituted aminoalkanoic acid N'-diamide of formula I.
Claim 4
Dependent Claim
34 words
A composition of matter as set forth in claim 2 wherein each of the alkyl radicals R 1 , R 2 , R 3 and R 4 contains from 12 to 18 carbon atoms.
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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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |