Granted Patent
Utility
US 4,280,636 · App. 06/141,953
Container cover locking assembly
Inventor:
Duane H. Lewis
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Apr 21, 1980
Inventor
Duane H. Lewis
Assignee (at issue)
Continental Plastic 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.