Granted Patent
Utility
US 6,569,340 · App. 10/109,148
Purification of biological substances
Inventor:
Henry B. Kopf
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Mar 27, 2002
Inventor
Henry B. Kopf
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.