Granted Patent
Utility
US 5,077,436 · App. 06/831,547
Bis(3-aminophenoxy) aromatics and method of preparing the same
Inventors:
Yukihiro Yoshikawa, Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Dec 31, 1991
Filed: Feb 21, 1986
Inventors
Yukihiro Yoshikawa
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.