Granted Patent
Utility
US 4,546,150 · App. 06/634,115
Film of polymer mixture containing 4-methyl-1-petene polymer
Inventor:
Hiromi Shigemoto
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Jul 24, 1984
Inventor
Hiromi Shigemoto
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.