Granted Patent
Utility
US 4,413,974 · App. 06/380,580
Apparatus for making a multi-layered blown plastic container
Inventor:
Robert F. Kontz
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: May 21, 1982
Inventor
Robert F. Kontz
Assignee (at issue)
Owens-Illinois 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.