Inventor · disambiguated record
Helmut Printzen
Also filed as: PRINTZEN HELMUT
5 granted patents·50 citations·filing 1984–1990
80Inventor score
Files withBAYER AG5
Top patents by PatentIndex Score
5 records- 0181US4620879AIron oxide yellow pigments having a low silking effect and a process for production thereofBAYER AG·Filed 1984·Granted Nov 4, 1986·19 cites·11 claims
- 0251US4698100AIron oxide yellow pigments having a low silking effect and a process for production thereofBAYER AG·Filed 1986·Granted Oct 6, 1987·9 cites·2 claims
- 0348US5185141AProcess for the production of iron oxide yellow pigmentsBAYER AG·Filed 1990·Granted Feb 9, 1993·10 cites·7 claims
- 0445US5032180AProcess for the production of iron oxide yellow pigmentsBAYER AG·Filed 1990·Granted Jul 16, 1991·8 cites·9 claims
- 0536US5076848AProcess for the preparation of iron yellow pigmentsBAYER AG·Filed 1990·Granted Dec 31, 1991·4 cites·10 claims
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