Granted Patent
Utility
US 6,328,944 · App. 08/982,369
Doped, pyrogenically prepared oxides
Inventors:
Helmut Mangold, Rainer Golchert, Stipan Katusic, Karlheinz Janzon
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Dec 2, 1997
Inventors
Helmut Mangold
Rainer Golchert
Stipan Katusic
Karlheinz Janzon
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.