Granted Patent
Utility
US 5,089,322 · App. 07/399,071
Polyethylene resin composition and film thereof
Inventors:
Takasi Matsunaga, Tosihiro Nisimura
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Aug 24, 1989
Inventors
Takasi Matsunaga
Tosihiro Nisimura
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.