Granted Patent
Utility
US 5,157,085 · App. 07/321,107
Polyimide resin composition
Inventors:
Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Shoji Tamai, Hideaki Oikawa, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Mar 9, 1989
Inventors
Masahiro Ohta
Saburo Kawashima
Katsuaki Iiyama
Shoji Tamai
Hideaki Oikawa
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.