Inventor · disambiguated record
Siegfried Keifer
Also filed as: KEIFER SIEGFRIED
3 granted patents·18 citations·filing 1974–1989
66Inventor score
Files withBAYER AG3
Top patents by PatentIndex Score
3 records- 0156US4985078AThermostable zinc ferrite color pigments containing 0.05-0.5 wt % lithium, a process for their preparation and their useBAYER AG·Filed 1989·Granted Jan 15, 1991·9 cites·4 claims
- 0236US4249953AAir pore lacquers containing white pigments or white fillersBAYER AG·Filed 1977·Granted Feb 10, 1981·7 cites·11 claims
- 0335US3960590AModified chromium oxide pigmentBAYER AG·Filed 1974·Granted Jun 1, 1976·2 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Siegfried Keifer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →