Granted Patent
Utility
US 5,648,070 · App. 08/315,696
Biocompatible anion exchange materials
Inventors:
Ben F. Brian, III, Marc E. Voorhees, Lloyd Forrestal
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Sep 30, 1994
Inventors
Ben F. Brian, III
Marc E. Voorhees
Lloyd Forrestal
Assignee (at issue)
Cobe Laboratories, 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.