Granted Patent
Utility
US 5,100,941 · App. 07/548,217
Polyolefin resin composition
Inventors:
Hiromi Shigemoto, Keiji Kawamoto, Tetsuji Kasai
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Jul 5, 1990
Inventors
Hiromi Shigemoto
Keiji Kawamoto
Tetsuji Kasai
Assignee (at issue)
Mitsui Petrochemical 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.