Granted Patent
Utility
US 5,690,828 · App. 08/601,250
Apparatus and method for supercritical fluid extraction
Inventors:
Dale L. Clay, Robert W. Allington, Phillip B. Liescheski, Robin R. Winter, Daniel G. Jameson
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Feb 14, 1996
Inventors
Dale L. Clay
Robert W. Allington
Phillip B. Liescheski
Robin R. Winter
Daniel G. Jameson
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.