Granted Patent
Utility
US 4,552,268 · App. 06/572,298
Light-tight carton for X-ray and other light sensitive film
Inventor:
John F. Lee
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Jan 20, 1984
Inventor
John F. Lee
Assignee (at issue)
Federal Paper Board Co., Inc.
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.