Inventor
KAMPFER HELMUT
14 patents
Patents
14 patentsUS4543308ASep 24, 1985
Photographic recording process
AGFA GEVAERT AG38 citations91
US3933507AJan 20, 1976
Photographic light-sensitive and heat developable material
AGFA GEVAERT AG49 citations87
US5266451ANov 30, 1993
Color photographic recording material
AGFA GEVAERT AG7 citations73
US5006455AApr 9, 1991
Gradation-variable black-and-white paper
AGFA GEVAERT AG7 citations71
US4987063AJan 22, 1991
Gradation variable black- and -white paper
AGFA GEVAERT AG10 citations70
US4483799ANov 20, 1984
Hydroxy alkane sulfonic acid sulfoalkyl esters
AGFA GEVAERT AG8 citations69
US4883880ANov 28, 1989
Process for the preparation of sulfoalkyl quaternary salts and for the production of alkane sultones
AGFA GEVAERT AG5 citations62
US4636460AJan 13, 1987
Photographic recording material and process for the production of photographic images
AGFA GEVAERT AG3 citations61
US5077183ADec 31, 1991
Color photographic recording material and a process for the preparation of a photographic silver halide emulsion
AGFA GEVAERT AG2 citations59
US4539408ASep 3, 1985
Process for the preparation of sulphoalkyl quaternary salts
AGFA GEVAERT AG2 citations57
US4504668AMar 12, 1985
Process for the preparation of N-sulfoalkyl quaternary salts of nitrogen heterocyclics
AGFA GEVAERT AG2 citations57
US4576907AMar 18, 1986
Color-photographic recording material
AGFA GEVAERT AG1 citations52
US3951664AApr 20, 1976
Light-sensitive material having developers embedded therein
AGFA GEVAERT AG1 citations51
US4308390ADec 29, 1981
Process for the production of sulphoalkyl quaternary salts
AGFA GEVAERT AG1 citations47