Granted Patent
Utility
US 5,278,216 · App. 07/899,141
Syndiotactic polypropylene resin composition
Inventors:
Tadashi Asanuma, Tetsunosuke Shiomura, Nobutaka Uchikawa, Tateyo Sasaki, Takeo Inoue
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Jun 17, 1992
Inventors
Tadashi Asanuma
Tetsunosuke Shiomura
Nobutaka Uchikawa
Tateyo Sasaki
Takeo Inoue
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.