Colorless petroleum markers
US6002056A · kind A · utility
10Cited by
18References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Jan 5, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M171/007
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Petroleum products are marked with a marker such as thymolphthalein or cresolphthalein. When the marked petroleum products are contacted with a developing reagent, a color develops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.