Granted Patent
Utility
US 5,113,009 · App. 07/457,076
Preparation and isolation of mineral acid salt of an amino acid methyl ester
Inventors:
Masanobu Ajioka, Chojiro Higuchi, Takeshi Oura, Toshio Katoh, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Dec 26, 1989
Inventors
Masanobu Ajioka
Chojiro Higuchi
Takeshi Oura
Toshio Katoh
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.