Granted Patent
Utility
US 6,802,961 · App. 10/221,767
Dense fluid cleaning centrifugal phase shifting separation process and apparatus
Inventor:
David Jackson
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Sep 12, 2002
Inventor
David Jackson
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.