Granted Patent
Utility
US 5,650,451 · App. 08/661,149
Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, surface modified biaxially oriented film of high molecular weight polyethylene and process for preparing the same
Inventors:
Kazuo Yagi, Hitoshi Mantoku, Akinao Hashimoto, Isaburo Higashi, Yoshinori Akana
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Jun 10, 1996
Inventors
Kazuo Yagi
Hitoshi Mantoku
Akinao Hashimoto
Isaburo Higashi
Yoshinori Akana
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.