Karlfried Keller

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Bergen-Enkheim, DT

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Patents Grantslast 30 patents

Information Patent Grant
Sulfo-containing phenol-formaldehyde condensates
- Patent number 4,079,040
- Issue date Mar 14, 1978
- Cassella Farbwerke Mainkur Aktiengesellschaft
- Joachim Ribka
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Aminoplasts elasticized with benzoic acid esters
- Patent number 4,043,984
- Issue date Aug 23, 1977
- Cassella Farbwerke Mainkur Aktiengesellschaft
- Karl-Heinz Keil
- B44 - DECORATIVE ARTS
Information Patent Grant
Melamine-formaldehyde condensates and mixtures thereof
- Patent number 4,039,493
- Issue date Aug 2, 1977
- Cassella Farbwerke Mainkur Aktiengesellschaft
- Manfred Schon
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...