Granted Patent
Utility
US 4,849,293 · App. 07/103,350
Amorphous polyester compositions and uses thereof
Inventors:
Hitoshi Koga, Kazuo Iwata, Masushi Mishimoto, Nikio Hashimoto
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Oct 1, 1987
Inventors
Hitoshi Koga
Kazuo Iwata
Masushi Mishimoto
Nikio Hashimoto
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.