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Rudolf Uchdorf
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Krefeld, DE
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Patents Grants
last 30 patents
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Patent Grant
Process for the preparation of polyamines of the diphenylmethane se...
Patent number
7,253,321
Issue date
Aug 7, 2007
Bayer MaterialScience AG
Torsten Hagen
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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
Information
Patent Grant
Process for producing polyisocyanates of the diphenyl methane serie...
Patent number
6,639,102
Issue date
Oct 28, 2003
Bayer Aktiengesellschaft
Torsten Hagen
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the production of polynuclear aromatic polyamines
Patent number
5,359,141
Issue date
Oct 25, 1994
Bayer Aktiengesellschaft
Hartmut Knofel
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of polyamine mixtures of the polyamino-p...
Patent number
5,310,769
Issue date
May 10, 1994
Bayer Aktiengesellschaft
Christian Konig
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of polynuclear aromatic polyamines
Patent number
5,196,591
Issue date
Mar 23, 1993
Bayer Aktiengesellschaft
Hartmut Knofel
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of polynuclear aromatic polyamines
Patent number
4,924,028
Issue date
May 8, 1990
Bayer Aktiengesellschaft
Hartmut Knofel
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of multinuclear aromatic polyamines
Patent number
4,914,236
Issue date
Apr 3, 1990
Bayer Aktiengesellschaft
Hartmut Knofel
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
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Patent Application
Process for the preparation of polyamines of the diphenylmethane se...
Publication number
20060287555
Publication date
Dec 21, 2006
Torsten Hagen
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
PROCESS FOR PRODUCING POLYISOCYANATES OF THE DIPHENYL METHANE SERIE...
Publication number
20030176626
Publication date
Sep 18, 2003
Torsten Hagen
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Method for production of diaminodiphenylmethanes
Publication number
20030023116
Publication date
Jan 30, 2003
Stephan Klein
C07 - ORGANIC CHEMISTRY