Granted Patent
Utility
US 4,857,636 · App. 07/187,721
Pasteurizable, freeze-driable hemoglobin-based blood substitute
Inventor:
Jen-Chang Hsia
Patented Case
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Granted: Aug 15, 1989
Filed: Apr 29, 1988
Inventor
Jen-Chang Hsia
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.