Granted Patent
Utility
US 5,567,515 · App. 08/365,540
Surface protective films
Inventors:
Hitoshi Koga, Masao Kameyama, Kazuo Iwata, Masahiro Gonda
Patented Case
View Patent ↗
Granted: Oct 22, 1996
Filed: Dec 28, 1994
Inventors
Hitoshi Koga
Masao Kameyama
Kazuo Iwata
Masahiro Gonda
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.