Granted Patent
Utility
US 5,184,423 · App. 07/638,843
Insulating industrial door and door manufacturing method
Inventor:
Lon H. McCarty
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Jan 8, 1991
Inventor
Lon H. McCarty
Assignee (at issue)
Econo Max Manufacturing
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.