Granted Patent
Utility
US 5,741,927 · App. 08/492,064
Separation process
Inventors:
David Parker, John A. Turner, Ian Peter Milne
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Jul 21, 1995
Inventors
David Parker
John A. Turner
Ian Peter Milne
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.