Granted Patent
Utility
US 4,332,600 · App. 06/110,002
Method for making silica fibers
Inventors:
Arno Wegerhoff, Hans Zengel, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken, Karlheinz Hillermeider
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Jan 7, 1980
Inventors
Arno Wegerhoff
Hans Zengel
Walter Brodowski
Heinz Beck
Ernst Seeberger
Gerhard Steenken
Karlheinz Hillermeider
Assignee (at issue)
Akzo N.V.
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.