Granted Patent
Utility
US 6,086,846 · App. 09/164,039
Use of synthetic, iron raw materials for preparing iron oxide pigments
Inventors:
Wilfried Burow, Wolfgang Oehlert, Ulrike Pitzer, Heribert Bade
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Sep 29, 1998
Inventors
Wilfried Burow
Wolfgang Oehlert
Ulrike Pitzer
Heribert Bade
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.