Granted Patent
Utility
US 6,489,521 · App. 09/905,931
Fixed bed catalysts
Inventors:
Daniel Ostgard, Konrad Moebus, Monika Berweiler, Barbara Bender, Gernot Stein
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Jul 17, 2001
Inventors
Daniel Ostgard
Konrad Moebus
Monika Berweiler
Barbara Bender
Gernot Stein
Assignee (at issue)
Degussa AG
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.