Ernst Klappert

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Kelkheim, DE

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Patents Grantslast 30 patents

Information Patent Grant
Monoazo pigment derived from acetoacetylamino benzimidazolone
- Patent number 4,370,269
- Issue date Jan 25, 1983
- Hoechst Aktiengesellschaft
- Friedrich W. Weingarten
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Monoazo compounds from 1-aminobenzene-2-carboxylic acid derivatives...
- Patent number 4,287,122
- Issue date Sep 1, 1981
- Hoechst Aktiengesellschaft
- Klaus Hunger
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...