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Helmut Kampfer
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Fischbach, DE
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last 30 patents
Information
Patent Grant
Color photographic recording material
Patent number
5,266,451
Issue date
Nov 30, 1993
Agfa-Gevaert Aktiengesellschaft
Arno Schmuck
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Color photographic recording material and a process for the prepara...
Patent number
5,077,183
Issue date
Dec 31, 1991
Agfa-Gevaert Aktiengesellschaft
Helmut Reuss
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Gradation-variable black-and-white paper
Patent number
5,006,455
Issue date
Apr 9, 1991
Agfa-Gevaert Aktiengesellschaft
Walter Patzold
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Gradation variable black- and -white paper
Patent number
4,987,063
Issue date
Jan 22, 1991
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Process for the preparation of sulfoalkyl quaternary salts and for...
Patent number
4,883,880
Issue date
Nov 28, 1989
AGFA-Gevaert Aktiengessellschaft
Helmut Kampfer
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Photographic recording material and process for the production of p...
Patent number
4,636,460
Issue date
Jan 13, 1987
Agfa-Gevaert Aktiengesellschaft
Heinz Meckl
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Color-photographic recording material
Patent number
4,576,907
Issue date
Mar 18, 1986
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photographic recording process
Patent number
4,543,308
Issue date
Sep 24, 1985
Agfa-Gevaert Aktiengesellschaft
Hans-Joachim Schumann
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Process for the preparation of sulphoalkyl quaternary salts
Patent number
4,539,408
Issue date
Sep 3, 1985
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of N-sulfoalkyl quaternary salts of nit...
Patent number
4,504,668
Issue date
Mar 12, 1985
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Hydroxy alkane sulfonic acid sulfoalkyl esters
Patent number
4,483,799
Issue date
Nov 20, 1984
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of sulphoalkyl quaternary salts
Patent number
4,308,390
Issue date
Dec 29, 1981
Agfa-Gevaert Aktiengesellschaft
Helmut Kampfer
C07 - ORGANIC CHEMISTRY