Granted Patent
Utility
US 4,480,037 · App. 06/465,064
Alkaline protease and preparation method thereof
Inventors:
Fiji Ichishima, Takashi Onouchi
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Feb 8, 1983
Inventors
Fiji Ichishima
Takashi Onouchi
Assignee (at issue)
SHOWA DENKO
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.