Granted Patent
Utility
US 6,425,501 · App. 09/860,511
Pump dispenser having vent valve
Inventors:
Wing-Kwong Keung, Scotty Ferrell, Gennaro R. Martire
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: May 21, 2001
Inventors
Wing-Kwong Keung
Scotty Ferrell
Gennaro R. Martire
Assignee (at issue)
Owens-Illinois Closure 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.