Granted Patent
Utility
US 5,324,355 · App. 07/842,607
Thermally split zirconium silicate, method of its production and use
Inventors:
Dieter Binder, Peter Kleinschmit, Klaus Zetzmann, Hans Hoffmeister
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Feb 27, 1992
Inventors
Dieter Binder
Peter Kleinschmit
Klaus Zetzmann
Hans Hoffmeister
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.