Granted Patent
Utility
US 4,778,916 · App. 07/122,583
Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof
Inventors:
Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Nov 17, 1987
Inventors
Ryuichi Mita
Toshio Katoh
Chojiro Higuchi
Takeshi Oura
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.