Inventor
BIERMANN HANS-PETER
DE5 patents
Patents
5 patentsUS4491619AJan 1, 1985
Thermostable iron oxide pigments
BAYER AG23 citations80
US4470844ASep 11, 1984
Agglomerated ferromagnetic iron particles
BAYER AG14 citations72
US4325739AApr 20, 1982
Magnetic metal and alloy pigments
BAYER AG13 citations72
US5185141AFeb 9, 1993
Process for the production of iron oxide yellow pigments
BAYER AG10 citations71
US4897166AJan 30, 1990
Antifoaming additive for acid liquids
BAYER AG4 citations50