Granted Patent
Utility
US 5,624,828 · App. 08/354,314
Process for producing L-tryptophan in serine auxotrophic microorganisms belonging to the genus corynebacterium or brevabacterium
Inventors:
Ryoichi Katsumata, Masato Ikeda, Keiko Nakanishi, Yuko Sasao
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Dec 12, 1994
Inventors
Ryoichi Katsumata
Masato Ikeda
Keiko Nakanishi
Yuko Sasao
Assignee (at issue)
KYOWA HAKKO KOGYO CO., LTD.
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.