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| Number | Title | Issue Date |
| 6811575 | Method for marking hydrocarbons with anthraquinones Method for invisibly marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon at least one dye selected from the group consisting of 1,4,5,8-tetrasubstituted anthraquinones and anthraquinone dimers. The absorption maxim... | 11/02/2004 |
| 5882358 | Colored transmission fluid Automatic transmission fluid containing a red dye stable even in long-lived transmission fluids.... | 03/16/1999 |
| 5665126 | Adducts of quinone compounds and amine-containing polymers for use in lubricating oils and in fuels Adducts useful as fuel or lubricating oil additives are disclosed. The adducts comprise the reaction product of at least one quinone compound and an amine-containing polymeric material comprising at least one member selected from the group consisting of (... | 09/09/1997 |
| 5588972 | Adducts of quinone compounds and amine-containing polymers for use in lubricating oils and in fuels Adducts useful as fuel or lubricating oil additives are disclosed. The adducts comprise the reaction product of at least one quinone compound and an amine-containing polymeric material comprising at least one member selected from the group consisting of (... | 12/31/1996 |
| 5482518 | Synergistic cetane improver composition comprising mixture of alkyl-nitrate and hydroperoxide quinone A fuel additive composition comprising an alkylnitrate such as a nitrate ester and hydroperoxide quinone which synergistically improves the cetane of diesel fuels and other middle distillate fractions, excluding jet.... | 01/09/1996 |
| 5304493 | Method for detecting a marker dye in aged petroleum distillate fuels Aged and/or colored diesel fuels and similar petroleum distillates may be analyzed for the presence of an anthraquinone marker dye such as DuPont Chemicals Oil Blue B Liquid dye by passing a sample of the fuel through an unbonded silica solid phase extrac... | 04/19/1994 |
| 5266080 | Methanol fuel containing flame luminosity agent The flame luminosity of a methanol fuel is appreciably enhanced by the addition thereto of at least one flame luminosity enhancing agent selected from the group consisting of azine dye, triarylmethane dye, fluorescein dye, imine dye and anthraquinone dye,... | 11/30/1993 |
| 5087268 | Processes for producing a ferrous picrate fuel additive A process for producing an additive for hydrocarbon fuels by combining picric acid, powdered iron, an activating acid, and a liquid organic solvent. Alternatively, the powdered iron can first be washed with the activating acid and the rinsed with water or... | 02/11/1992 |
| 4292047 | Benzoquinone and amine reaction product for fuels and mineral oils A benzoquinone and hydrocarbyl amine reaction product having detergent and corrosion inhibiting properties for fuel and lubricant compositions is provided.... | 09/29/1981 |
| 3964294 | Technique and system for coding and identifying materials Microencapsulated spheroids containing a coded, volatile electron absorbing substance are dispersed into a material to be regulated such as crude oil in a tanker. Samples of the material such as an oil spill are collected and the source of the material is... | 06/22/1976 |
