Inventor
SIEBER ALEXANDER
DE14 patents
⚠️ This page may combine multiple inventors who share the name “SIEBER ALEXANDER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOECHST AG
13 patentsUS5102459AApr 7, 1992
Use of colorants for recording fluids
HOECHST AG57 citations96
US5021473AJun 4, 1991
Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objects
HOECHST AG61 citations95
US5137576AAug 11, 1992
Quinacridones having selectively adjusted triboelectric effects
HOECHST AG24 citations92
US5015676AMay 14, 1991
Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objects
HOECHST AG27 citations92
US4777105AOct 11, 1988
Magenta colorant for electrophotographic recording processes
HOECHST AG27 citations92
US5069994ADec 3, 1991
Use of colorless, intensely fluorinated ammonium and iminium compounds as charge control agents for electrophotographic recording processes
HOECHST AG41 citations90
US5073579ADec 17, 1991
Process for enhancing the electrostatic chargeability of powder coatings of powders, and the use thereof for surface-coating solid objects
HOECHST AG19 citations81
US5061585AOct 29, 1991
Blue coloring agent for electro-photographic copying processes with positive control action
HOECHST AG13 citations73
US4957841ASep 18, 1990
Specifically influencing the triboelectric effect of azo pigments
HOECHST AG14 citations72
US4859728AAug 22, 1989
Pasty pigment formulations, production and use thereof
HOECHST AG8 citations72
US5194665AMar 16, 1993
Surfactants based on hydroxynaphthoic esters and preparation and use thereof
HOECHST AG3 citations60
US4980425ADec 25, 1990
Surfactants based on hydroxynaphthoic esters and preparation and use thereof
HOECHST AG4 citations60
US4786575ANov 22, 1988
Pigment for electrophotographic recording processes
HOECHST AG1 citations52