Granted Patent
Utility
US 6,648,965 · App. 09/899,542
Fire door components and fire doors comprising the components
Inventor:
Donald F. Klus
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jul 6, 2001
Inventor
Donald F. Klus
Assignee (at issue)
G-P Gypsum Corp.
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.