Granted Patent
Utility
US 4,923,613 · App. 07/192,657
Method for determining a patient's blood sodium level and artificial kidney for the application thereof
Inventor:
Jacques Chevallet
Patented Case
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Granted: May 8, 1990
Filed: May 11, 1988
Inventor
Jacques Chevallet
Assignee (at issue)
Hospal Industrie
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.