Inventor · disambiguated record
Hans-Tobias Macholdt
Also filed as: MACHOLDT HANS · MACHOLDT HANS-TOBIAS · MACHOLDT HANS-TOBIAS DR
54 granted patents·5 pending applications·1,241 citations·filing 1975–2009
99Inventor score
Files withHOECHST AG28CLARIANT GMBH13CLARIANT PRODUKTE DEUTSCHLAND7CLARIANT FINANCE BVI LTD5CASSELLA FARBWERKE MAINKUR AG1
Top patents by PatentIndex Score
59 records- 0194US7309558B1Use of salt-like structured silicas as charge control agentsCLARIANT PRODUKTE DEUTSCHLAND·Filed 2000·Granted Dec 18, 2007·46 cites·6 claims
- 0292US6028178APigment for electrophotographic toners and developersCLARIANT GMBH·Filed 1999·Granted Feb 22, 2000·39 cites·10 claims
- 0391US5558809APolymer electrets with improved charge stabilityHOECHST CELANESE CORP·Filed 1995·Granted Sep 24, 1996·68 cites·1 claims
- 0490US7309389B2Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic mediasCLARIANT FINANCE BVI LTD·Filed 2006·Granted Dec 18, 2007·9 cites·10 claims
- 0590US7285592B2Pigments dispersions based on water and acrylateCLARIANT PRODUKTE DEUTSCHLAND·Filed 2002·Granted Oct 23, 2007·35 cites·16 claims
- 0690US6117606AUse of pigment yellow 155 in electrophotographic toners and developers, powder coatings and inkjet inksCLARIANT GMBH·Filed 1998·Granted Sep 12, 2000·62 cites·19 claims
- 0790US5021473AProcess for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objectsHOECHST AG·Filed 1988·Granted Jun 4, 1991·61 cites·8 claims
- 0888US5137576AQuinacridones having selectively adjusted triboelectric effectsHOECHST AG·Filed 1989·Granted Aug 11, 1992·24 cites·11 claims
- 0987US6506221B1Process for preparing purified dyestuffsCLARIANT FINANCE BVI LTD·Filed 2000·Granted Jan 14, 2003·24 cites·10 claims
- 1086US6406528B1Use of improved cyan pigments in inkjet inksCLARIANT GMBH·Filed 2001·Granted Jun 18, 2002·23 cites·10 claims
- 1186US5563016ADiallylammonium compounds, processes for their preparation and their useHOECHST AG·Filed 1995·Granted Oct 8, 1996·27 cites·23 claims
- 1286US4777105AMagenta colorant for electrophotographic recording processesHOECHST AG·Filed 1987·Granted Oct 11, 1988·27 cites·3 claims
- 1385US6391507B1Cyan pigments in electrophotographic toners and developersCLARIANT GMBH·Filed 2000·Granted May 21, 2002·28 cites·10 claims
- 1485US5502118APolyester salts and their use as charge control agentsHOECHST AG·Filed 1994·Granted Mar 26, 1996·58 cites·19 claims
- 1584US7387670B2Pigment preparations based on phthalocyanine pigmentsCLARIANT PRODUKTE DEUTSCHLAND·Filed 2005·Granted Jun 17, 2008·8 cites·10 claims
- 1684US7008475B2Water-based colorant preparationsCLARIANT GMBH·Filed 2002·Granted Mar 7, 2006·26 cites·18 claims
- 1784US5378571AAryl and aralkyl sulfide, sulfoxide or sulfone compounds as charge regulatorsHOECHST AG·Filed 1991·Granted Jan 3, 1995·32 cites·8 claims
- 1883US5871845AElectret fibers having improved charge stability, process for the production thereof and textile material containing these electret fibers.HOECHST AG·Filed 1994·Granted Feb 16, 1999·83 cites·11 claims
- 1982US7135266B2Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic mediasCLARIANT FINANCE BVI LTD·Filed 2002·Granted Nov 14, 2006·16 cites·8 claims
- 2082US5069994AUse of colorless, intensely fluorinated ammonium and iminium compounds as charge control agents for electrophotographic recording processesHOECHST AG·Filed 1989·Granted Dec 3, 1991·41 cites·14 claims
- 2180US7311769B2Pigment compositions consisting of a yellow disazo pigment and an organic pigmentCLARIANT PRODUKTE DEUTSCHLAND·Filed 2004·Granted Dec 25, 2007·14 cites·11 claims
- 2279US5147748AUse of colorless highly fluorine-substituted phosphonium compounds as charge control agents for electrophotographic recording processesHOECHST AG·Filed 1990·Granted Sep 15, 1992·27 cites·8 claims
- 2377US5554722AAromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereofHOECHST AG·Filed 1994·Granted Sep 10, 1996·61 cites·38 claims
- 2477US5342723ABiscationic acid amide and acid imide derivatives as charge controllersHOECHST AG·Filed 1990·Granted Aug 30, 1994·21 cites·10 claims
- 2576US6030738AUse of inter-polyelectrolyte complexes as charge control agentsCLARIANT GMBH·Filed 1998·Granted Feb 29, 2000·26 cites·8 claims
- 2675US6168895B1Pigment for electrophotographic toners and developersCLARIANT GMBH·Filed 1997·Granted Jan 2, 2001·24 cites·19 claims
- 2775US5475119ADiallylammonium compounds, processes for their preparation and their useHOECHST AG·Filed 1992·Granted Dec 12, 1995·19 cites·17 claims
- 2874US5015676AProcess for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objectsHOECHST AG·Filed 1988·Granted May 14, 1991·27 cites·8 claims
- 2973US7611812B2Use of salts of layered double hydroxides as charge control agentsCLARIANT PRODUKTE DEUTSCHLAND·Filed 2003·Granted Nov 3, 2009·8 cites·14 claims
- 3073US5800602AUse of inclusion compounds of cyclic polysaccharides as charge control agentsHOECHST AG·Filed 1996·Granted Sep 1, 1998·24 cites·14 claims
- 3173US5274184AAryl sulphide, aryl sulphoxide and aryl sulphone compoundsCASSELLA FARBWERKE MAINKUR AG·Filed 1991·Granted Dec 28, 1993·14 cites·7 claims
- 3270US5585216AUse of cyclic oligosaccharides as charge control agentsHOECHST AG·Filed 1995·Granted Dec 17, 1996·28 cites·15 claims
- 3369US6251553B1Use of mixed-crystal pigments of the quinacridone series in electrophotographic toners and developers, powder coatings and inkjet inksCLARIANT GMBH·Filed 1999·Granted Jun 26, 2001·27 cites·12 claims
- 3469US6083653ACyclooligosaccharide-boron complexCLARIANT GMBH·Filed 1998·Granted Jul 4, 2000·19 cites·7 claims
- 3567US6207335B1Use of metal carboxylates and sulfonates as charge control agentsCLARIANT GMBH·Filed 1999·Granted Mar 27, 2001·20 cites·13 claims
- 3666US5073579AProcess for enhancing the electrostatic chargeability of powder coatings of powders, and the use thereof for surface-coating solid objectsHOECHST AG·Filed 1988·Granted Dec 17, 1991·19 cites·5 claims
- 3765US5061585ABlue coloring agent for electro-photographic copying processes with positive control actionHOECHST AG·Filed 1987·Granted Oct 29, 1991·13 cites·8 claims
- 3862US7569318B2Use of salts of layered double hydoxidesCLARIANT PRODUKTE DEUTSCHLAND·Filed 2003·Granted Aug 4, 2009·5 cites·14 claims
- 3960US5401809APolymer ammonium borates and processes for their preparationHOECHST AG·Filed 1993·Granted Mar 28, 1995·23 cites·7 claims
- 4057US5693867AProcess for isolating tetraphenylboratesHOECHST AG·Filed 1996·Granted Dec 2, 1997·6 cites·2 claims
- 4157US5187038APolymeric ammonium compounds as charge control agentsHOECHST AG·Filed 1991·Granted Feb 16, 1993·12 cites·18 claims
- 4256US5500323ACharge control with cyclic polysulfonyldially ammonium saltsHOECHST AG·Filed 1995·Granted Mar 19, 1996·15 cites·11 claims
- 4354US5053537AAmmonium and iminium compoundsHOECHST AG·Filed 1989·Granted Oct 1, 1991·4 cites·13 claims
- 4452US7621967B2Blue dye with particularly high purity and positive triboelectric control effectCLARIANT PRODUKTE DEUTSCHLAND·Filed 2003·Granted Nov 24, 2009·2 cites·9 claims
- 4552US5329046ABiscationic acid amide and imide derivatives and processes for their preparationHOECHST AG·Filed 1990·Granted Jul 12, 1994·4 cites·6 claims
- 4650US4957841ASpecifically influencing the triboelectric effect of azo pigmentsHOECHST AG·Filed 1989·Granted Sep 18, 1990·14 cites·7 claims
- 4750US2011091804A1Copper Phthalocyanine Pigment PreparationCLARIANT FINANCE BVI LTD·Filed 2009·Application pending·0 cites
- 4849US4017671AProcess for the continuous manufacture of cellulose glycolateHOECHST AG·Filed 1975·Granted Apr 12, 1977·6 cites·5 claims
- 4948US7097699B2Composition for printing recording materialsCLARIANT FINANCE BVI LTD·Filed 2002·Granted Aug 29, 2006·1 cites·9 claims
- 5047US5600003AProcess for isolating tetraphenylboratesHOECHST AG·Filed 1995·Granted Feb 4, 1997·4 cites·19 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →