Granted Patent
Utility
US 4,981,605 · App. 07/201,024
Liquid modified ethylenic random copolymer and its uses
Inventors:
Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jun 1, 1988
Inventors
Toshiyuki Tsutsui
Akinori Toyota
Norio Kashiwa
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.