Granted Patent
Utility
US 4,507,450 · App. 05/818,754
Process for preparing polyolefin
Inventors:
Genjiro Kakogawa, Masayoshi Hasuo, Yoshinori Suga, Kazuhisa Kojima
Patented Case
View Patent ↗
Granted: Mar 26, 1985
Filed: Jul 25, 1977
Inventors
Genjiro Kakogawa
Masayoshi Hasuo
Yoshinori Suga
Kazuhisa Kojima
Assignee (at issue)
Mitsubishi Chemical Industries, Ltd.
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.