Granted Patent
Utility
US 5,424,477 · App. 08/128,739
Preparation process of .alpha.-aspartyl-L-phenylalanine methyl ester
Inventors:
Chojiro Higuchi, Ikumi Kitada, Akinori Nagatomo, Katashi Enomoto, Masanobu Ajioka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Sep 30, 1993
Inventors
Chojiro Higuchi
Ikumi Kitada
Akinori Nagatomo
Katashi Enomoto
Masanobu Ajioka
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.