Granted Patent
Utility
US 4,473,527 · App. 06/438,707
Method and apparatus for forming inflation film
Inventors:
Takumi Fujisaki, Toshiro Ozaki, Tadao Adachi
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Nov 2, 1982
Inventors
Takumi Fujisaki
Toshiro Ozaki
Tadao Adachi
Assignees (at issue)
Mitsui Petrochemical Industries, Ltd.
PLACO CO, 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.