Granted Patent
Utility
US 4,847,311 · App. 07/143,164
Polyimide resin composition
Inventors:
Norimasa Yamaya, Nobuhito Koga, Kenichi Baba
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Nov 30, 1987
Inventors
Norimasa Yamaya
Nobuhito Koga
Kenichi Baba
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.