Granted Patent
Utility
US 5,501,933 · App. 08/245,620
Toner containing pigment and surface modified pyrogenically produced aluminum oxide
Inventors:
Hans Deusser, Dieter Kerner, Ju/ rgen Meyer, Gu/ nther Michael, Andreas Stubbe
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: May 19, 1994
Inventors
Hans Deusser
Dieter Kerner
Ju/ rgen Meyer
Gu/ nther 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.