Granted Patent
Utility
US 5,428,127 · App. 08/339,298
Preparation process of syndiotactic polyproplene
Inventors:
Tadashi Asanuma, Tetsunosuke Shiomura, Nobutaka Uchikawa, Tateyo Sasaki, Norihide Inoue, Osamu Uchida, Tutomu Iwatani
Patented Case
View Patent ↗
Granted: Jun 27, 1995
Filed: Nov 10, 1994
Inventors
Tadashi Asanuma
Tetsunosuke Shiomura
Nobutaka Uchikawa
Tateyo Sasaki
Norihide Inoue
Osamu Uchida
Tutomu Iwatani
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.