Granted Patent
Utility
US 5,228,477 · App. 07/850,307
Leak preventing device for a closed container
Inventors:
Dave Chirdon, Doug Durney
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Mar 12, 1992
Inventors
Dave Chirdon
Doug Durney
Assignee (at issue)
ILC Dover LP
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.