Granted Patent
Utility
US 6,255,425 · App. 08/182,348
Syndiotactic polypropylene copolymer and extruded polypropylene articles
Inventors:
Tadashi Asanuma, Tetsunosuke Shiomura, Nobutaka Uchikawa, Tateyo Sasaki, Osamu Uchida, Tutomu Iwatani, Shigeru Kimura, Takeo Inoue
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Jan 18, 1994
Inventors
Tadashi Asanuma
Tetsunosuke Shiomura
Nobutaka Uchikawa
Tateyo Sasaki
Osamu Uchida
Tutomu Iwatani
Shigeru Kimura
Takeo Inoue
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.