Granted Patent
Utility
US 4,784,944 · App. 06/720,348
Prothrombin time determining reagent and methods of using and preparing the same
Inventor:
Hans-Jurgen Kolde
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Apr 5, 1985
Inventor
Hans-Jurgen Kolde
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.