Inventor
PFENNINGER JOHANNES
CH10 patents
Patents
10 patentsUS5025041AJun 18, 1991
Pearlescent coating compositions
CIBA GEIGY CORP27 citations92
US4895949AJan 23, 1990
Process for preparation of quinacridone solid solutions
CIBA GEIGY CORP37 citations92
US4778899AOct 18, 1988
Process for the preparation of pyrrolo (3,4-c) pyrroles
CIBA GEIGY CORP28 citations92
US4720305AJan 19, 1988
Mixtures of pigments
CIBA GEIGY CORP45 citations92
US4659775AApr 21, 1987
Process for the preparation of pyrrolo[3,4-c]pyrroles, and novel pyrrolo[3,4-c]pyrroles
CIBA GEIGY CORP24 citations82
US4810802AMar 7, 1989
Process for the preparation of brominated pyrrolo-[3,4-c]-pyrroles and mixtures thereof
CIBA GEIGY CORP11 citations74
US4895948AJan 23, 1990
Process for preparation of opaque quinacridones
CIBA GEIGY CORP12 citations73
US5229515AJul 20, 1993
Process for preparing modified β-quinacridone pigment
CIBA GEIGY CORP13 citations71
US4681971AJul 21, 1987
Phenyl substituted aminodicarboxylate esters
CIBA GEIGY CORP2 citations62
US4749795AJun 7, 1988
Phenyl substituted pyrrolinones
CIBA GEIGY CORP3 citations59