Granted Patent
Utility
US 5,457,181 · App. 07/683,109
Preparation of a high-purity human factor IX concentrate and other plasmatic proteins and their therapeutic use
Inventors:
Catherine Michalski, Thierry Burnouf
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Apr 11, 1991
Inventors
Catherine Michalski
Thierry Burnouf
Assignee (at issue)
Centre Regional de Transfusion Sanguine de Lille
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.