Inventor · disambiguated record
Alexander Sieber
Also filed as: SIEBER ALEXANDER
14 granted patents·306 citations·filing 1987–1998
93Inventor score
Top patents by PatentIndex Score
14 records- 0194US5102459AUse of colorants for recording fluidsHOECHST AG·Filed 1991·Granted Apr 7, 1992·57 cites·13 claims
- 0290US5021473AProcess 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
- 0388US5137576AQuinacridones having selectively adjusted triboelectric effectsHOECHST AG·Filed 1989·Granted Aug 11, 1992·24 cites·11 claims
- 0486US4777105AMagenta colorant for electrophotographic recording processesHOECHST AG·Filed 1987·Granted Oct 11, 1988·27 cites·3 claims
- 0582US5069994AUse 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
- 0674US5015676AProcess 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
- 0766US5073579AProcess 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
- 0865US5061585ABlue coloring agent for electro-photographic copying processes with positive control actionHOECHST AG·Filed 1987·Granted Oct 29, 1991·13 cites·8 claims
- 0956US6110267APigment combinations for inks for the intaglio printing of illustrations, having improved rheological propertiesCLARIANT GMBH·Filed 1998·Granted Aug 29, 2000·7 cites·12 claims
- 1050US4980425ASurfactants based on hydroxynaphthoic esters and preparation and use thereofHOECHST AG·Filed 1989·Granted Dec 25, 1990·4 cites·16 claims
- 1150US4957841ASpecifically influencing the triboelectric effect of azo pigmentsHOECHST AG·Filed 1989·Granted Sep 18, 1990·14 cites·7 claims
- 1242US4859728APasty pigment formulations, production and use thereofHOECHST AG·Filed 1988·Granted Aug 22, 1989·8 cites·20 claims
- 1336US5194665ASurfactants based on hydroxynaphthoic esters and preparation and use thereofHOECHST AG·Filed 1990·Granted Mar 16, 1993·3 cites·17 claims
- 1431US4786575APigment for electrophotographic recording processesHOECHST AG·Filed 1987·Granted Nov 22, 1988·1 cites·2 claims
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