Alexander Sieber
14Patents
8h-index
19Co-inventors
65Inventor score
Filing activity: Jan 22, 1987 → Mar 16, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5021473A | Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objects | Chemistry; Metallurgy | 47 | Expired |
| US5102459A | Use of colorants for recording fluids | Chemistry; Metallurgy | 36 | Expired |
| US5069994A | Use of colorless, intensely fluorinated ammonium and iminium compounds as charge control agents for electrophotographic recording processes | Physics | 31 | Expired |
| US5137576A | Quinacridones having selectively adjusted triboelectric effects | Chemistry; Metallurgy | 23 | Expired |
| US5015676A | Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objects | Chemistry; Metallurgy | 19 | Expired |
| US4777105A | Magenta colorant for electrophotographic recording processes | Physics | 18 | Expired |
| US5073579A | Process for enhancing the electrostatic chargeability of powder coatings of powders, and the use thereof for surface-coating solid objects | Chemistry; Metallurgy | 15 | Expired |
| US4957841A | Specifically influencing the triboelectric effect of azo pigments | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5061585A | Blue coloring agent for electro-photographic copying processes with positive control action | Physics | 8 | Expired |
| US4859728A | Pasty pigment formulations, production and use thereof | Chemistry; Metallurgy | 6 | Expired |
| US6110267A | Pigment combinations for inks for the intaglio printing of illustrations, having improved rheological properties | Chemistry; Metallurgy | 4 | Expired |
| US4980425A | Surfactants based on hydroxynaphthoic esters and preparation and use thereof | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4786575A | Pigment for electrophotographic recording processes | Physics | 1 | Expired |
| US5194665A | Surfactants based on hydroxynaphthoic esters and preparation and use thereof | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.