Granted Patent
Utility
US 5,258,149 · App. 07/878,580
Process of making a membrane for high efficiency removal of low density lipoprotein-cholesterol from whole blood
Inventors:
Marc E. Parham, Richard L. Duffy, Donald T. Nicholson
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: May 5, 1992
Inventors
Marc E. Parham
Richard L. Duffy
Donald T. Nicholson
Assignee (at issue)
W.R. Grace & Co. Conn.
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.