Granted Patent
Utility
US 5,470,943 · App. 08/360,584
Polyimide
Inventors:
Yoshihiro Sakata, Wataru Yamashita, Yuichi Okawa, Shoji Tamai, Tsutomu Ishida, Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Dec 21, 1994
Inventors
Yoshihiro Sakata
Wataru Yamashita
Yuichi Okawa
Shoji Tamai
Tsutomu Ishida
Mitsunori Matsuo
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.