Granted Patent
Utility
US 4,989,757 · App. 07/401,517
Plastic container with self-draining feature
Inventor:
Thomas J. Krall
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Aug 29, 1989
Inventor
Thomas J. Krall
Assignee (at issue)
Owens-Illinois Plastic Products 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.