Johann Wenghoefer

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East Greenwich, RI, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for coloring fiber materials with azo dyestuff containing -...
- Patent number 4,283,196
- Issue date Aug 11, 1981
- American Hoechst Corporation
- Johann Wenghoefer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Azo dyestuffs containing -SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H an...
- Patent number 4,271,072
- Issue date Jun 2, 1981
- American Hoechst Corporation
- Johann Wenghoefer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water soluble copper complex monoazo dyestuff based upon ortho-amin...
- Patent number 4,138,395
- Issue date Feb 6, 1979
- American Hoechst Corporation
- Johann Wenghoefer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...