Gerhard Pfaff
62Patents
18h-index
78Co-inventors
87Inventor score
Filing activity: Jul 19, 1982 → Apr 21, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6596070B1 | Interference pigments | Emerging Cross-Sectional Technologies | 121 | Expired |
| US5858078A | Platelet-shaped titanium dioxide pigment | Chemistry; Metallurgy | 111 | Expired |
| US6156115A | Multilayer interference pigment with transparent central layer | Chemistry; Metallurgy | 54 | Expired |
| US6517628B1 | Pigment mixture | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5286291A | Pigments containing carbon black | Chemistry; Metallurgy | 44 | Expired |
| US6267810A | Pigment mixture | Chemistry; Metallurgy | 43 | Expired |
| US5350448A | Electrically conductive pigments | Chemistry; Metallurgy | 36 | Expired |
| US6280520A | Multilayer pearl luster pigment based on an opaque substrate | Chemistry; Metallurgy | 33 | Expired |
| US6291551A | Laser-markable plastics | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6500251B1 | Multi-coated interference pigments | Chemistry; Metallurgy | 27 | Expired |
| US4984977A | Screw-type extruder having a starting valve and throttle | Performing Operations; Transporting | 26 | Expired |
| US6648957B1 | Multilayer nacreous pigment | Chemistry; Metallurgy | 26 | Expired |
| US6132504A | Multilayer interference pigment with absorbent central layer | Chemistry; Metallurgy | 26 | Expired |
| US5320781A | Conductive pigment | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6294010A | Pigment mixture | Chemistry; Metallurgy | 24 | Expired |
| US5972098A | Titanate-containing pearlescent pigments | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6456897B1 | Control method and numerical control for motion control of industrial machine tools | Physics | 19 | Expired |
| US6656259B2 | Multilayered interference pigments | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5945035A | Conductive pigments | Fixed Constructions | 17 | Expired |
| US4480301A | Method and apparatus for controlling a pulsed frequency converter | Electricity | 17 | Expired |
| US6337160B1 | Manganese dioxide electrodes, process for producing the same and their use | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6238472A | Metal oxide coated titanium dioxide lamellas | Chemistry; Metallurgy | 15 | Expired |
| US6284032A | Multilayer interference pigments | Chemistry; Metallurgy | 15 | Expired |
| US6334893B1 | Pigment mixture | Chemistry; Metallurgy | 13 | Expired |
| US6376577B2 | Laser-markable plastics | Performing Operations; Transporting | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.