Granted Patent
Utility
US 4,444,825 · App. 06/410,861
Fire-screening panel
Inventors:
Robert Vanderstukken, Marcel De Boel
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Aug 23, 1982
Inventors
Robert Vanderstukken
Marcel De Boel
Assignee (at issue)
Glaverbel
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.