Granted Patent
Utility
US 4,929,545 · App. 07/339,051
Method and reagent for determination of an analyte via enzymatic means using a ferricyanide/ferric compound system
Inventor:
Helmut Freitag
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Apr 14, 1989
Inventor
Helmut Freitag
Assignee (at issue)
Boehringer Mannheim GmbH
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.