Erhard Schellmann

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Cologne, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of organic polyisocyanates containing u...
- Patent number 4,292,255
- Issue date Sep 29, 1981
- Bayer Aktiengesellschaft
- Hans J. Hennig
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of organic polyisocyanates containing b...
- Patent number 4,264,519
- Issue date Apr 28, 1981
- Bayer Aktiengesellschaft
- Hans J. Hennig
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of chloroformic acid methyl ester
- Patent number 4,261,918
- Issue date Apr 14, 1981
- Bayer Aktiengesellschaft
- Werner Schulte-Huermann
- C07 - ORGANIC CHEMISTRY