US Patent:
20210009909, Jan 14, 2021
Inventors:
- Midland MI, US
- Collegeville PA, US
Warren E. Smith - Buckinghamshire, GB
Jeremy Chris Reyes - Lake Jackson TX, US
Zahid Asif - Royersford PA, US
Clark H. Cummins - Midland MI, US
William L. Winniford - Lake Jackson TX, US
International Classification:
C10L 1/00
C07D 311/82
C10L 1/185
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 R, R, R, R, R, R, R, R, Rand R-substituted xanthene, wherein R, R, R, R, R, R, R, R, Rand Rindependently are hydrogen, hydrocarbyl, hydrocarbyloxy, aryl or aryloxy; wherein each compound of formula (I) is present at a level from 0.01 ppm to 20 ppm.