Granted Patent
Utility
US 5,013,817 · App. 07/266,678
Process for preparing a polyimide and a composite material containing the same
Inventors:
Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Hideaki Oikawa, Akihiro Yamaguchi, Tomohito Koba, Toshiyuki Nakakura, Hideo Sakai, Misao Masuda, Satoru Kishi, Chiaki Maruko
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Nov 3, 1988
Inventors
Masahiro Ohta
Saburo Kawashima
Shoji Tamai
Hideaki Oikawa
Akihiro Yamaguchi
Tomohito Koba
Toshiyuki Nakakura
Hideo Sakai
Misao Masuda
Satoru Kishi
Chiaki Maruko
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.