Gerhard Umsonst

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Frenkendorf, CH

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Patents Grantslast 30 patents

Information Patent Grant
Process for coloring linear polyesters in the melt
- Patent number 4,344,767
- Issue date Aug 17, 1982
- Ciba-Geigy Corporation
- Gerhard Umsonst
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the mass coloration or whitening of linear polyesters
- Patent number 4,093,584
- Issue date Jun 6, 1978
- Ciba-Geigy Corporation
- Gunther Zwahlen
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING