Granted Patent
Utility
US 5,647,985 · App. 08/323,559
Whole blood leukodepletion and platelet filter
Inventors:
Neng S. Ung-Chhun, Richard J. Johnson
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Oct 17, 1994
Inventors
Neng S. Ung-Chhun
Richard J. Johnson
Assignee (at issue)
Baxter 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.