Granted Patent
Utility
US 6,533,136 · App. 09/739,949
Sealing closure for extrusion blow molded containers
Inventor:
Wendell D. Willingham
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Dec 18, 2000
Inventor
Wendell D. Willingham
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.