Granted Patent
Utility
US 5,794,382 · App. 08/562,921
Fire rated removable mullion
Inventor:
Matthew S. Prucinsky
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Nov 27, 1995
Inventor
Matthew S. Prucinsky
Assignee (at issue)
Von Duprin LLC
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.