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US 2002/0038064 A1Published application
Colorless petroleum marker dyes
OwnerAnjali S. Asgaonkarinventor
Life of this patent
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Abstract
A composition comprising a liquid petroleum product and a colorless marker compound in an amount that is not detectable visually, and a method for marking a liquid petroleum product with a colorless marker compound.
Claims10
A composition comprising a liquid petroleum product and a compound having the formula
- 2
- wherein R1 is C1-C18 alkyl, C1-C18 alkenyl, aryl or aralkyl;
- R2, R3 and R4 are independently hydrogen, C1-C12 alkyl, chloro or bromo;
- and R5 is hydrogen, chloro or bromo;
- and wherein said compound is present in an amount that is not detectable visually.
2 more elements
A compound having the formula
- 3
A method of marking a liquid petroluem product comprising adding to the petroleum product as a marker a compound of formula
- 4
- wherein R1 is C1-C18 alkyl, C1-C18 alkenyl, aryl or aralkyl;
- R2, R3 and R4 are independently hydrogen, C1-C12 alkyl, chloro or bromo;
- and R5 is hydrogen, chloro or bromo;
- wherein the compound is not detectable visually, and wherein the compound develops a color on contact with a developing reagent.
2 more elements
Dependencies are inferred from the claim text.