Granted Patent
Utility
US 5,656,558 · App. 08/283,853
Fire retardant safety glass
Inventors:
Peter Brix, Werner Kiefer, Roland Leroux
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Aug 1, 1994
Inventors
Peter Brix
Werner Kiefer
Roland Leroux
Assignee (at issue)
Schott Glaswerke
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.