Granted Patent
Utility
US 4,671,890 · App. 06/745,066
Aminobenzylamine composition
Inventors:
Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Midori Yamazaki, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 9, 1987
Filed: Jun 17, 1985
Inventors
Keizaburo Yamaguchi
Kenichi Sugimoto
Yoshimitsu Tanabe
Midori Yamazaki
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.