Granted Patent
Utility
US 5,837,051 · App. 08/571,726
Process for the thermal treatment of iron oxides in a circulating fluidized bed
Inventors:
Jorg Krekel, Berndt-Ullrich Kohler, Horst Brunn
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Dec 13, 1995
Inventors
Jorg Krekel
Berndt-Ullrich Kohler
Horst Brunn
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.