3-Dicyanomethylidene-2,3-dihydrothiophen-1,1-dioxide derivatives
US4281115A · kind A · utility
6Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1979 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Jul 25, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B23/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to disperse dyes containing a group of formula I, ##STR1## in which R.sub.1 signifies the atoms necessary to complete an arylene radical, their production and intermediates therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.