Granted Patent
Utility
US 5,276,133 · App. 07/894,346
Favorably processable polyimide and process for preparing polyimide
Inventors:
Yuichi Okawa, Shoji Tamai, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Jun 4, 1992
Inventors
Yuichi Okawa
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.