Helmut Engelhard

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Dormagen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Polyalkylene oxide-containing urethane polyols with sulphonic acid...
- Patent number 4,245,110
- Issue date Jan 13, 1981
- Bayer Aktiengesellschaft
- Helmut Engelhard
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Dihydroxy carbamates containing sulphonic acid groups
- Patent number 4,166,186
- Issue date Aug 28, 1979
- Bayer Aktiengesellschaft
- Gerhard D. Wolf
- C07 - ORGANIC CHEMISTRY