Granted Patent
Utility
US 5,017,293 · App. 07/398,065
Multi-pass blood washing and plasma removal device and method
Inventors:
John M. Radovich, Richard W. Schofield
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Aug 24, 1989
Inventors
John M. Radovich
Richard W. Schofield
Assignee (at issue)
Pfizer Hospital Products Group, 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.