Hans-Georg Zengel

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Kleinwallstadt, DT

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Patents Grantslast 30 patents

Information Patent Grant
Benzene-1,3,5-tris-acetoxime and the process for making phlorogluci...
- Patent number 4,071,555
- Issue date Jan 31, 1978
- Akzona Incorporated
- Hans Zengel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of phloroglucinol
- Patent number 4,057,588
- Issue date Nov 8, 1977
- Akzona Incorporated
- Hans-Georg Zengel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of aromatic and cycloaliphatic dicarboxy...
- Patent number 4,053,510
- Issue date Oct 11, 1977
- Akzo N.V.
- Hans Zengel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Production of N,N-dichloro-terephthalamide and N,N-dichloro-isophth...
- Patent number 3,965,172
- Issue date Jun 22, 1976
- Akzona Incorporated
- Hans-Georg Zengel
Information Patent Grant
Production of p-aminobenzoic acid
- Patent number 3,931,210
- Issue date Jan 6, 1976
- Akzo N.V.
- Hans-Georg Zengel
- C07 - ORGANIC CHEMISTRY