Heavy metal complexes of azo compounds containing a halogeno-2,3-dihydroxy pyridine coupling component
US3971738A · kind A · utility
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3Claims
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Key dates
| Filing date | Nov 14, 1973 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Nov 14, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/025
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Azo compounds of the formula EQU D-N=N-K (1) wherein D denotes the radical of an aromatic diazo component and K denotes the radical of a halogeno-2,3-dihydroxy-pyridine, as well as heavy metal complexes of azo compounds of the formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.