Granted Patent
Utility
US 4,764,992 · App. 07/148,188
Dispenser having air lock forming means
Inventor:
Anthony Delia
Patented Case
View Patent ↗
Granted: Aug 23, 1988
Filed: Jan 25, 1988
Inventor
Anthony Delia
Assignee (at issue)
The Drackett Company
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.