Granted Patent
Utility
US 5,707,478 · App. 08/523,758
Method for producing thermoplastic resin sheet or film
Inventors:
Atsushi Fujii, Akira Funaki, Tohru Yukumoto
Patented Case
View Patent ↗
Granted: Jan 13, 1998
Filed: Sep 5, 1995
Inventors
Atsushi Fujii
Akira Funaki
Tohru Yukumoto
Assignee (at issue)
Idemitsu Petrochemical 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.