Fuel compositions, methods and uses relating to quaternary ammonium salt additives for fuel used in spark ignition engines
US11174442B2 · kind B2 · utility
1Cited by
40References
20Claims
0Family size
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Key dates
| Filing date | Mar 28, 2018 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Mar 28, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2270/023
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A gasoline fuel composition comprising as an additive an ester compound which is the reaction product of an optionally substituted polycarboxylic acid or an anhydride thereof and an alcohol or formula H—(OR)n—OR1, wherein R is an optionally substituted alkylene group; R1 is hydrogen or an optionally substituted hydrocarbyl group, and n is 0 or a positive integer; wherein n is not O when R1 is hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.