Granted Patent
Utility
US 5,268,447 · App. 07/914,015
Readily processable polyimide and preparation process of same
Inventors:
Shoji Tamai, Masahiro Ohta, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Jul 15, 1992
Inventors
Shoji Tamai
Masahiro Ohta
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.