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Rainer Zielke
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Erlenbach, DE
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last 30 patents
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Patent Grant
Polymere N-halogenamide auf basis von acryl-und methacrylamid
Patent number
4,357,447
Issue date
Nov 2, 1982
Akzo nv
Hans-Georg Zengel
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymeric N-halogenoamides on the basis of acrylamide and methacryl...
Patent number
4,356,289
Issue date
Oct 26, 1982
Akzo nv
Hans-Georg Zengel
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the preparation of ureas
Patent number
4,346,233
Issue date
Aug 24, 1982
Akzona Incorporated
Hans G. Zengel
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Polyfunctional isocyanates free of alkali and urea groups
Patent number
4,301,257
Issue date
Nov 17, 1981
Akzona Incorporated
Hans Zengel
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the preparation of phloroglucinol
Patent number
4,296,260
Issue date
Oct 20, 1981
Akzona Incorporated
Rainer Zielke
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of isocyanate derivatives of aliphatic,...
Patent number
4,238,404
Issue date
Dec 9, 1980
Akzona Incorporated
Hans Zengel
C07 - ORGANIC CHEMISTRY