Granted Patent
Utility
US 6,296,769 · App. 09/366,128
Multi-chambered supercritical fluid extraction cartridge and processes using it
Inventors:
Henry L. Walters, Dale Messer, Dale L. Clay, Robert W. Allington
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Aug 2, 1999
Inventors
Henry L. Walters
Dale Messer
Dale L. Clay
Robert W. Allington
Assignee (at issue)
Isco, 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.