Granted Patent
Utility
US 4,883,848 · App. 07/320,859
Method for producing an olefin polymer
Inventors:
Yoshinori Suga, Eiji Tanaka, Yasuo Maruyama, Eiji Isobe
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Mar 6, 1989
Inventors
Yoshinori Suga
Eiji Tanaka
Yasuo Maruyama
Eiji Isobe
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.