Granted Patent
Utility
US 5,506,311 · App. 08/335,332
Polyimides, process for the preparation thereof and polyimide resin compositions
Inventors:
Shoji Tamai, Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Hideaki Oikawa, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Nov 3, 1994
Inventors
Shoji Tamai
Masahiro Ohta
Saburo Kawashima
Katsuaki Iiyama
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.