Oil-spill marking method and composition
US5356465A · kind A · utility
2Cited by
10References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jul 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for visibly marking an area contaminated with transformer oil or other organic liquid uses a marking composition that consists of a colorant held within a solid carrier material, the colorant being such as to effect a visibly perceptible change upon contact with the organic liquid. The carrier material may be an absorbent that permits delivery of the colorant through capillary action, or the colorant may be encapsulated by a cell-forming matrix material that interacts with the contaminating liquid to effect release.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.