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Bernd Hupfer
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North Kingstown, RI, US
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last 30 patents
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Patent Grant
Polyamide containing the hexafluoroisopropylidene group and process...
Patent number
5,240,819
Issue date
Aug 31, 1993
Hoechst Celanese Corporation
Werner H. Mueller
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Photopolymerizable mixture, copying material containing same and pr...
Patent number
5,198,325
Issue date
Mar 30, 1993
Hoechst Aktiengesellschaft
Bernd Hupfer
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Polyamide containing the hexafluoroisopropylidene group
Patent number
5,077,378
Issue date
Dec 31, 1991
Hoechst Celanese Corporation
Werner H. Mueller
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polyamide containing the hexafluoroisopropylidene group with O-quin...
Patent number
5,021,320
Issue date
Jun 4, 1991
Hoechst Celanese Corporation
Werner H. Mueller
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polyamic acids, polyimides prepared from these and process for prod...
Patent number
4,871,833
Issue date
Oct 3, 1989
Hoechst Aktiengesellschaft
Bernd Hupfer
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...