| Patents for C09B 50 - Formazane dyes; Tetrazolium dyes (105) | |
|---|---|
| 06/1979 | |
| 06/12/1979 | US4158003 Metallized bis-formazans |
| 03/1979 | |
| 03/20/1979 | CA1050972A1 Insecticides |
| 02/1979 | |
| 02/27/1979 | US4141890 Azo compounds having a 3-sulphomethyl-pyrazolone-(5) coupler component |
| 05/1978 | |
| 05/30/1978 | US4092478 Triphendioxazine triazinyl dyes having phosphonic acid groups |
| 03/1978 | |
| 03/14/1978 | US4079049 Transition metal complex formazan dyestuffs containing at least one phosphonic acid group |
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