Substituted dibenzofurans as fuel markers
US11274258B2 · kind B2 · utility
0Cited by
15References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 25, 2019 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Mar 25, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2230/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel; said method comprising adding to said petroleum hydrocarbon or liquid biologically derived fuel at least one compound that is a R1, R2, R3, R4, R5, R6, R7 and R8—substituted dibenzofuran, wherein R1, R2, R3, R4, R5, R6, R7 and R8 independently are hydrogen, hydrocarbyl, hydrocarbyloxy, aryl or aryloxy; provided that R1, R2, R3, R4, R5, R6, R7 and R8 collectively have at least two carbon atoms; wherein each compound having formula (I) is present at a level from 0.01 ppm to 20 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.