Granted Patent
Utility
US 4,320,977 · App. 06/152,161
Method for optically assaying liquid samples with polyganol transparent stirrer
Inventor:
Shinichiro Matsumoto
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: May 22, 1980
Inventor
Shinichiro Matsumoto
Assignee (at issue)
Mitsubishi Chemical Industries, 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.