Stabilized stain composition
US4741898A · kind A · utility
35Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Apr 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Formulations of a cationic dye component (e.g., Azure A-Azure B-Azure C mixtures), an anionic dye component (e.g., Eosin Y) and an alcohol solvent (e.g., methanol or methanol-glycerol mixtures) are stabilized by an amino acid or its acid addition salt (e.g. lysine hydrochloride or glycine or a mixture of these).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.