Everhard Gratzfeld
4Patents
2h-index
4Co-inventors
37Inventor score
Filing activity: Oct 7, 1975 → Dec 9, 1988
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4046861A | Process for the production of ferrocyanide blue | Chemistry; Metallurgy | 41 | Expired |
| US4378995A | Iron blue pigment, process for making the same and use | Chemistry; Metallurgy | 40 | Expired |
| US4915742A | Iron blue pigment, process for its pigmentation and use | Chemistry; Metallurgy | 0 | Expired |
| US4368075A | Iron blue pigment, process for making the same and use | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.