Granted Patent
Utility
US 6,224,847 · App. 08/716,269
Process for the extraction of a compound by a fluorocarbon compound
Inventors:
Richard Powell, Timothy James Noakes, Peter Frederick Wilde
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Jan 31, 1997
Inventors
Richard Powell
Timothy James Noakes
Peter Frederick Wilde
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.