Dirk Grotjohann

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Leverkusen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Preparation process
- Patent number 7,351,823
- Issue date Apr 1, 2008
- Bayer Healthcare AG
- Mathias Berwe
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for production of diaminodiphenylmethanes
- Patent number 6,649,798
- Issue date Nov 18, 2003
- Bayer Aktiengesellschaft
- Stephan Klein
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Preparation process
- Publication number 20050182055
- Publication date Aug 18, 2005
- Bayer Healthcare AG
- Mathias Berwe
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Method for production of diaminodiphenylmethanes
- Publication number 20030023116
- Publication date Jan 30, 2003
- Stephan Klein
- C07 - ORGANIC CHEMISTRY