Volker Wilhelm
8Patents
4h-index
12Co-inventors
54Inventor score
Filing activity: Sep 8, 1982 → Jun 11, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4450012A | Flocculation-resistant, mixed phase pigments having a rutile structure, process for their preparation, and their use | Chemistry; Metallurgy | 10 | Expired |
| US5167708A | Process for the preparation of pigments containing Cr.sub.2 O.sub.3 | Chemistry; Metallurgy | 7 | Expired |
| US8647429B2 | Effect pigments | Chemistry; Metallurgy | 6 | Active |
| US4919726A | Process for the production of rutile mixed-phase pigments | Chemistry; Metallurgy | 4 | Expired |
| US4985078A | Thermostable zinc ferrite color pigments containing 0.05-0.5 wt % lithium, a process for their preparation and their use | Chemistry; Metallurgy | 3 | Expired |
| US8613800B2 | Pigment preparations | Chemistry; Metallurgy | 3 | Active |
| US4919723A | Rutile mixed phase pigments with improved coloristic properties | Chemistry; Metallurgy | 2 | Expired |
| US10689505B2 | Microspheres | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.