Granted Patent
Utility
US 5,643,468 · App. 08/491,979
Method and apparatus for displacing liquor from a slurry of particulate solid material
Inventor:
Alan Macpherson Ure
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jul 20, 1995
Inventor
Alan Macpherson Ure
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.