Granted Patent
Utility
US 5,283,313 · App. 07/795,748
Readily processable polyimide, preparation process of polyimide, and resin composition of polyimide
Inventors:
Wataru Yamashita, Shoji Tamai, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Nov 21, 1991
Inventors
Wataru Yamashita
Shoji Tamai
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.