Granted Patent
Utility
US 4,923,959 · App. 07/268,439
Polyaminobisimide resin from bis(anilino propylene) benzene
Inventors:
Kojiro Kan, Isao Kaneko
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Nov 8, 1988
Inventors
Kojiro Kan
Isao Kaneko
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.