Granted Patent
Utility
US 5,081,189 · App. 07/408,488
Propylene-ethylene copolymer composition and process for producing the same
Inventors:
Takayuki Yamada, Takashi Kanbayashi, Shigeru Kimura, Takeo Inoue
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Aug 11, 1989
Inventors
Takayuki Yamada
Takashi Kanbayashi
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.