P

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 patents
US5264032ANov 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 patents
US6537364B2Mar 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 patents

CLARIANT INT LTD

2 patents

(unassigned)

1 patent

HOECHST MITSUBISHI KASEI

1 patent

Showing the top 50 of 68 patents by PatentIndex Score.