Granted Patent
Utility
US 6,734,270 · App. 10/089,066
Polypropylene-based calendered article and injection-molded article
Inventors:
Yutaka Minami, Masami Kanamaru, Koji Kakigami, Atsuhiko Ubara
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Apr 5, 2002
Inventors
Yutaka Minami
Masami Kanamaru
Koji Kakigami
Atsuhiko Ubara
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.