Granted Patent
Utility
US 5,219,968 · App. 07/777,238
Propylene copolymer
Inventors:
Tetsunosuke Shiomura, Tadashi Asanuma, Masashiro Kouno, Norihide Inoue, Satoshi Fukushima, Yoshiho Sonobe, Kazumi Mizutani, Tutomu Iwatani, Ryuichi Sugimoto
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Nov 12, 1991
Inventors
Tetsunosuke Shiomura
Tadashi Asanuma
Masashiro Kouno
Norihide Inoue
Satoshi Fukushima
Yoshiho Sonobe
Kazumi Mizutani
Tutomu Iwatani
Ryuichi Sugimoto
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.