Granted Patent
Utility
US 4,754,068 · App. 06/940,201
1,3-bis(3-aminophenoxy)-5-halogenobenzenes and process for their preparation
Inventors:
Keizaburo Yamaguchi, Yukihiro Yoshikawa, Yoshimitsu Tanabe, Kenichi Sugimoto, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Dec 15, 1986
Inventors
Keizaburo Yamaguchi
Yukihiro Yoshikawa
Yoshimitsu Tanabe
Kenichi Sugimoto
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.