Granted Patent
Utility
US 5,354,839 · App. 08/040,608
Polyimide and preparation process of same
Inventors:
Wataru Yamashita, Yoshihiro Sakata, Toshiyuki Kataoka, Yuichi Okawa, Hideaki Oikawa, Tadashi Asanuma, Mitsunori Matsuo, Tsutomu Ishida, Keizaburo Yamaguchi, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Mar 31, 1993
Inventors
Wataru Yamashita
Yoshihiro Sakata
Toshiyuki Kataoka
Yuichi Okawa
Hideaki Oikawa
Tadashi Asanuma
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.