Granted Patent
Utility
US 5,419,928 · App. 08/141,083
Surface-modified pyrogenically produced aluminum oxide
Inventors:
Hans Deusser, Dieter Kerner, Jurgen Meyer, Gunther Michael, Andreas Stubbe
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Oct 26, 1993
Inventors
Hans Deusser
Dieter Kerner
Jurgen Meyer
Gunther Michael
Andreas Stubbe
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.