Inventor · disambiguated record
Johannes Pfenninger
Also filed as: PFENNINGER JOHANNES
10 granted patents·202 citations·filing 1985–1991
91Inventor score
Files withCIBA GEIGY CORP10
Top patents by PatentIndex Score
10 records- 0194US4720305AMixtures of pigmentsCIBA GEIGY CORP·Filed 1985·Granted Jan 19, 1988·45 cites·15 claims
- 0293US4895949AProcess for preparation of quinacridone solid solutionsCIBA GEIGY CORP·Filed 1988·Granted Jan 23, 1990·37 cites·17 claims
- 0391US4778899AProcess for the preparation of pyrrolo (3,4-c) pyrrolesCIBA GEIGY CORP·Filed 1987·Granted Oct 18, 1988·28 cites·4 claims
- 0489US4659775AProcess for the preparation of pyrrolo[3,4-c]pyrroles, and novel pyrrolo[3,4-c]pyrrolesCIBA GEIGY CORP·Filed 1985·Granted Apr 21, 1987·24 cites·8 claims
- 0577US4895948AProcess for preparation of opaque quinacridonesCIBA GEIGY CORP·Filed 1988·Granted Jan 23, 1990·12 cites·10 claims
- 0676US5025041APearlescent coating compositionsCIBA GEIGY CORP·Filed 1989·Granted Jun 18, 1991·27 cites·11 claims
- 0774US4810802AProcess for the preparation of brominated pyrrolo-[3,4-c]-pyrroles and mixtures thereofCIBA GEIGY CORP·Filed 1987·Granted Mar 7, 1989·11 cites·14 claims
- 0873US5229515AProcess for preparing modified β-quinacridone pigmentCIBA GEIGY CORP·Filed 1991·Granted Jul 20, 1993·13 cites·10 claims
- 0951US4749795APhenyl substituted pyrrolinonesCIBA GEIGY CORP·Filed 1987·Granted Jun 7, 1988·3 cites·3 claims
- 1045US4681971APhenyl substituted aminodicarboxylate estersCIBA GEIGY CORP·Filed 1985·Granted Jul 21, 1987·2 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →