Granted Patent
Utility
US 5,861,122 · App. 08/531,046
Restrictor orifice for off-line supercritical fluid extraction collection system
Inventors:
Mehdi Ashraf-Khorassani, Gregory P. Shogan, Raymond K. Houck
Patented Case
View Patent ↗
Granted: Jan 19, 1999
Filed: Sep 20, 1995
Inventors
Mehdi Ashraf-Khorassani
Gregory P. Shogan
Raymond K. Houck
Assignee (at issue)
Suprex Corporation
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.