Granted Patent
Utility
US 5,260,388 · App. 07/894,940
Polyimide and process for the preparation thereof
Inventors:
Shoji Tamai, Wataru Yamashita, Yuichi Okawa, Yuko Ishihara, Keizaburo Yamaguchi, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Jun 8, 1992
Inventors
Shoji Tamai
Wataru Yamashita
Yuichi Okawa
Yuko Ishihara
Keizaburo Yamaguchi
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.