Granted Patent
Utility
US 4,699,879 · App. 06/668,148
Process for microbial production of an optically active 3-(3,4-dihydroxyphenyl)serine
Inventors:
Hamao Umezawa, Tomio Takeuchi, Toshiharu Nagatsu, Masa Hamada, Shuichi Iwadare, Ikuo Matsumoto, Hajime Morishima
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Nov 5, 1984
Inventors
Hamao Umezawa
Tomio Takeuchi
Toshiharu Nagatsu
Masa Hamada
Shuichi Iwadare
Ikuo Matsumoto
Hajime Morishima
Assignees (at issue)
Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
Banyu Pharmaceutical 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.