Use of rare earth complexes as markers of petroleum products, crude oils, biofuels or lubricants
US10975318B2 · kind B2 · utility
0Cited by
4References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 12, 2017 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Jan 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The use, as markers of petroleum products, crude oils, biofuels or lubricants, of rare earth complexes or one of the constituents thereof chosen from rare earth ligands or salts, being capable of forming a rare earth complex after the addition of a developing solution. Preferably, the rare earth complex can be detected by time-resolved fluorescence. Also, a marking method and a method for detecting a rare earth complex as a marker of petroleum products, crude oils, biofuels or lubricants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.