Granted Patent
Utility
US 5,002,718 · App. 07/381,242
Method of blow molding a flat container having portions with greatly varying wall thickness
Inventors:
Hirosi Tanaka, Kozo Morisige
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Jul 18, 1989
Inventors
Hirosi Tanaka
Kozo Morisige
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.