Granted Patent
Utility
US 6,083,859 · App. 08/878,824
Boron oxide-silicon dioxide mixed oxide
Inventors:
Helmut Mangold, Manfred Ettlinger, Dieter Kerner, Peter Kleinschmit
Patented Case
View Patent ↗
Granted: Jul 4, 2000
Filed: Jun 19, 1997
Inventors
Helmut Mangold
Manfred Ettlinger
Dieter Kerner
Peter Kleinschmit
Assignee (at issue)
Degussa-Huels 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.