Granted Patent
Utility
US 4,405,721 · App. 06/246,057
Diagnostic agent for the detection of ketone bodies
Inventor:
Helmut Kohl
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Mar 20, 1981
Inventor
Helmut Kohl
Assignee (at issue)
Behringwerke Aktiengesellschaft
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.