Granted Patent
Utility
US 4,769,463 · App. 07/024,461
2,6-bis(aminophenoxy)pyridine and method of preparing the same
Inventors:
Keizaburo Yamaguchi, Kenichi Sugimoto, Yukihiro Yoshikawa, Yoshimitsu Tanabe, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Mar 11, 1987
Inventors
Keizaburo Yamaguchi
Kenichi Sugimoto
Yukihiro Yoshikawa
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.