Granted Patent
Utility
US 4,782,021 · App. 06/698,533
Method of producing L-serine
Inventors:
Kenichi Ishiwata, Nobuyoshi Makiguichi, Hideki Kawashima, Tadashi Suzuki, Masami Imadegawa
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Feb 5, 1985
Inventors
Kenichi Ishiwata
Nobuyoshi Makiguichi
Hideki Kawashima
Tadashi Suzuki
Masami Imadegawa
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.