Granted Patent
Utility
US 5,338,792 · App. 08/063,761
Heat-resistant overwrap film from 4-methyl-1-pentene and isobutylene and 1-butene
Inventors:
Yasushi Nagase, Masami Kobayashi, Tatsuo Kato, Shinichi Imuta
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: May 20, 1993
Inventors
Yasushi Nagase
Masami Kobayashi
Tatsuo Kato
Shinichi Imuta
Assignees (at issue)
Mitsui Petrochemical Industries, Ltd.
Chugoku Resin 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.