Granted Patent
Utility
US 5,013,848 · App. 07/087,255
Aromatic bismaleimide derivatives and process for preparing same
Inventors:
Yukihiro Yoshikawa, Midori Yamazaki, Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Jul 22, 1987
Inventors
Yukihiro Yoshikawa
Midori Yamazaki
Keizaburo Yamaguchi
Kenichi Sugimoto
Yoshimitsu Tanabe
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.