Granted Patent
Utility
US 4,474,634 · App. 06/366,330
Process for producing a laminated film or sheet structure
Inventors:
Takayuki Hiraoka, Kenji Fujiyoshi
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Apr 7, 1982
Inventors
Takayuki Hiraoka
Kenji Fujiyoshi
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.