Granted Patent
Utility
US 6,089,418 · App. 08/880,208
Dispensing closure with pressure actuated valve
Inventors:
Rick Gaiser, Valentin Hierzer, Robert A. Simpson
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jun 23, 1997
Inventors
Rick Gaiser
Valentin Hierzer
Robert A. Simpson
Assignee (at issue)
Crown Cork & Seal Technologies Corporation
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.