by reacting nitro azo dyes with amine or amino azo dye with nitro compounds

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Patents Grantslast 30 patents

Information Patent Grant
Photographic material containing sulphonic acid group containing di...
- Patent number 4,118,232
- Issue date Oct 3, 1978
- Ciba-Geigy AG
- Bernhard Piller
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Sulfonic-acid-group containing disazo dyestuffs
- Patent number 4,051,123
- Issue date Sep 27, 1977
- Ciba-Geigy AG
- Bernhard Piller
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
3211556
- Patent number 3,211,556
- Issue date Oct 12, 1965
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
2394998
- Patent number 2,394,998
- Issue date Feb 19, 1946
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
2283294
- Patent number 2,283,294
- Issue date May 19, 1942
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
2109183
- Patent number 2,109,183
- Issue date Feb 22, 1938
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...