Granted Patent
Utility
US 5,484,880 · App. 08/354,806
Polyimide
Inventors:
Wataru Yamashita, Yuichi Okawa, Shoji Tamai, Mitsunori Matsuo, Tsutomu Ishida, Keizaburo Yamaguchi, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Dec 13, 1994
Inventors
Wataru Yamashita
Yuichi Okawa
Shoji Tamai
Mitsunori Matsuo
Tsutomu Ishida
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.