Granted Patent
Utility
US 4,668,752 · App. 06/663,557
Linear ethylene copolymer
Inventors:
Kenichi Tominari, Hiroshi Inoue, Masayuki Sakai
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Oct 22, 1984
Inventors
Kenichi Tominari
Hiroshi Inoue
Masayuki Sakai
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.