Granted Patent
Utility
US 4,828,906 · App. 07/093,206
Resin composition and film suitable for agricultural covering material
Inventors:
Toshihiro Nishimura, Takashi Matsunaga
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Sep 4, 1987
Inventors
Toshihiro Nishimura
Takashi Matsunaga
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.