Gebhard Ritter

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Hanau, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing catechol and hydroquinone
- Patent number 5,026,925
- Issue date Jun 25, 1991
- Degussa Aktiengesellschaft
- Karl-Heinz Drauz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of preparing substituted dihydroxy-benzenes
- Patent number 4,825,011
- Issue date Apr 25, 1989
- Degussa AG
- Karl-Heinz Drauz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for the preparation of substituted trihydroxybenzenes
- Patent number 4,762,953
- Issue date Aug 9, 1988
- Degussa Aktiengesellschaft
- Guenter Prescher
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of trihydroxy-and/or alkoxy-hydroxybenzenes
- Patent number 4,751,332
- Issue date Jun 14, 1988
- Degussa Aktiengesellschaft
- Guenter Prescher
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for the preparation of trihydroxybenzenes
- Patent number 4,751,333
- Issue date Jun 14, 1988
- Degussa Aktiengesellschaft
- Guenter Prescher
- C07 - ORGANIC CHEMISTRY