Granted Patent
Utility
US 5,627,038 · App. 08/322,970
Factor IX chromogenic assay
Inventor:
H. C. Hemker
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Oct 13, 1994
Inventor
H. C. Hemker
Assignee (at issue)
Dade International, Inc.
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.