Inventor
DIETZ ERWIN
US68 patents
⚠️ This page may combine multiple inventors who share the name “DIETZ ERWIN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOECHST AG
29 patentsUS5264032ANov 23, 1993
Pigment preparations
HOECHST AG58 citations96
US5264034ANov 23, 1993
Pigment preparations based on perylene compounds
HOECHST AG101 citations96
US5110931AMay 5, 1992
Process for the preparation of n,n'-dimethylperylene-3,4,9,10-tetracarboxylic diimide in high-hiding pigment form
HOECHST AG84 citations96
US4156616AMay 29, 1979
Pigment dispersion for use in hydrophilic and hydrophobic media
HOECHST AG100 citations94
US5466807ANov 14, 1995
Perylene compounds containing sulfonic acid groups process for preparing them and their use
HOECHST AG56 citations93
US5318627AJun 7, 1994
Process for the preparation of pigment preparations based on C.I. pigment violet 23
HOECHST AG38 citations93
US5296034AMar 22, 1994
Process for the production of copper phthalocyanine pigment preparations of the α phase
HOECHST AG28 citations93
US5296033AMar 22, 1994
Process for the production of pigment preparations based on phythalocyanine pigments
HOECHST AG25 citations93
US5248774ASep 28, 1993
Inner salts based on ammonium and sulfonate groups of perylene-3,4,9,10-tetracarboxylic and derivatives thereof
HOECHST AG48 citations93
US5112404AMay 12, 1992
Pigment formulations, processes for their preparation and their use
HOECHST AG22 citations93
US5837160ANov 17, 1998
Chiral CLCPs containing colored monomers
HOECHST AG21 citations92
US5368641ANov 29, 1994
Modified 2,9-dimethylquinacridone pigments, process for their manufacture and a method for pigmenting or lacquer systems with these pigments
HOECHST AG33 citations92
US5137576AAug 11, 1992
Quinacridones having selectively adjusted triboelectric effects
HOECHST AG24 citations92
US5342723AAug 30, 1994
Biscationic acid amide and acid imide derivatives as charge controllers
HOECHST AG21 citations91
US4986852AJan 22, 1991
Pigments and use thereof
HOECHST AG31 citations90
US4986851AJan 22, 1991
Pigment dispersions, processes for their preparation and their use
HOECHST AG42 citations88
US5834064ANov 10, 1998
Effect coatings whose perceived color depends on the viewing angle
HOECHST AG17 citations84
US5662739ASep 2, 1997
Use of fatty acid taurides for the dispersion of polycyclic pigments
HOECHST AG14 citations74
US5591258AJan 7, 1997
Preparation of linear, unsubstituted quinacridone pigments of the β-phase
HOECHST AG14 citations74
US5275653AJan 4, 1994
Pigment preparations based on dioxazine compounds
HOECHST AG19 citations74
US5123966AJun 23, 1992
Mixed crystal pigments based on halogenated perylenetetracarboximides
HOECHST AG11 citations74
US5071482ADec 10, 1991
Pigment preparations
HOECHST AG13 citations74
US5071483ADec 10, 1991
Process for the preparation of pigment preparations of the anthanthrone series
HOECHST AG14 citations74
US5035747AJul 30, 1991
Mixed crystal pigments of the anthanthrone series, and preparation and use thereof
HOECHST AG9 citations74
US5207829AMay 4, 1993
Pigment preparations
HOECHST AG8 citations73
US4785082ANov 15, 1988
Process for preparing a highly concentrated aqueous press cakes of an azo disperse dye from dilute aqueous suspension thereof wherein surfactant is added before the dye is isolated
HOECHST AG7 citations73
US4451656AMay 29, 1984
Imidazoline addition compounds
HOECHST AG7 citations73
US5698705ADec 16, 1997
Isoindoline pigments
HOECHST AG11 citations72
US4881980ANov 21, 1989
Pigments of the quinacridonequinone series, processes for their preparation and their use
HOECHST AG10 citations72
CLARIANT GMBH
15 patentsUS6537364B2Mar 25, 2003
Process for fine division of organic pigments by precipitation
CLARIANT GMBH82 citations96
US6409816B1Jun 25, 2002
Pigment preparations based on diketopyrrolopyrrole pigments with basic perylene dispersants
CLARIANT GMBH22 citations93
US6582508B2Jun 24, 2003
Process for fine division of organic pigments
CLARIANT GMBH24 citations92
US7102014B2Sep 5, 2006
Pigment dispersants based on diketopyrrolopyrrole compounds and pigment preparations
CLARIANT GMBH21 citations91
US7045637B2May 16, 2006
Pigment dispersants based on diketopyrrolopyrrole compounds and pigment preparations
CLARIANT GMBH15 citations91
US6918958B2Jul 19, 2005
Acid pigment dispersants and pigment preparations
CLARIANT GMBH38 citations91
US6548647B2Apr 15, 2003
Process for preparing azo colorants
CLARIANT GMBH43 citations90
US6221150B1Apr 24, 2001
Perylene compounds and pigment preparations
CLARIANT GMBH20 citations84
US7045638B2May 16, 2006
Pigment dispersants based on diketopyrrolopyrrole compounds and pigment preparations
CLARIANT GMBH13 citations82
US7056378B2Jun 6, 2006
Method for producing vattable organic pigments
CLARIANT GMBH8 citations74
US5834072ANov 10, 1998
Powder coatings whose perceived color depends on the viewing angle
CLARIANT GMBH15 citations74
US6646126B2Nov 11, 2003
Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form
CLARIANT GMBH6 citations73
US6521756B2Feb 18, 2003
Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form
CLARIANT GMBH8 citations73
US6413309B1Jul 2, 2002
Pigment preparations comprising two or more perylene compounds
CLARIANT GMBH11 citations72
US6017984AJan 25, 2000
Colored cholesteric liquid-crystal polymers having optically variable properties
CLARIANT GMBH11 citations72
CLARIANT FINANCE BVI LTD
2 patentsCLARIANT INT LTD
2 patents(unassigned)
1 patentHOECHST MITSUBISHI KASEI
1 patentShowing the top 50 of 68 patents by PatentIndex Score.