Granted Patent
Utility
US 6,454,946 · App. 08/947,775
Carbohydrate purification using ultrafiltration, reverse osmosis and nanofiltration
Inventor:
Shawn DeFrees
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Oct 9, 1997
Inventor
Shawn DeFrees
Assignee (at issue)
Neose Technologies, 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.