Granted Patent
Utility
US 4,908,412 · App. 07/377,803
Thermoplastic elastomer composition excellent in heat bondability
Inventors:
Yasuhiko Otawa, Toshiyuki Maeda, Kunihide Hiraoka, Katsuo Okamoto
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Jul 12, 1989
Inventors
Yasuhiko Otawa
Toshiyuki Maeda
Kunihide Hiraoka
Katsuo Okamoto
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.