Granted Patent
Utility
US 5,200,131 · App. 07/679,522
Method for molding syndiotactic polypropylene
Inventors:
Tadashi Asanuma, Tateyo Sasaki, Mitsuru Ito, Shigeru Kimura, Takeo Inoue
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Apr 2, 1991
Inventors
Tadashi Asanuma
Tateyo Sasaki
Mitsuru Ito
Shigeru Kimura
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.