Inventor · disambiguated record
Everhard Gratzfeld
Also filed as: GRATZFELD EVERHARD
4 granted patents·98 citations·filing 1975–1988
74Inventor score
Files withDEGUSSA4
Top patents by PatentIndex Score
4 records- 0190US4046861AProcess for the production of ferrocyanide blueDEGUSSA·Filed 1975·Granted Sep 6, 1977·53 cites·14 claims
- 0288US4378995AIron blue pigment, process for making the same and useDEGUSSA·Filed 1981·Granted Apr 5, 1983·45 cites·13 claims
- 0327US4368075AIron blue pigment, process for making the same and useDEGUSSA·Filed 1981·Granted Jan 11, 1983·0 cites·9 claims
- 0420US4915742AIron blue pigment, process for its pigmentation and useDEGUSSA·Filed 1988·Granted Apr 10, 1990·0 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →