Granted Patent
Utility
US 4,774,323 · App. 07/067,990
Purification of von Willebrand Factor solutions using gel permeation chromatography
Inventors:
Jack Newman, David L. Farb
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Jun 29, 1987
Inventors
Jack Newman
David L. Farb
Assignee (at issue)
Rorer Pharmaceutical Corporation
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.