Granted Patent
Utility
US 6,743,403 · App. 09/936,781
Process for the removal of oxalate and/or sulphate from Bayer liquors
Inventors:
Steven Rosenberg, Wayne Tichbon, Darrel J. Wilson, Catherine A. Heath
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Sep 18, 2001
Inventors
Steven Rosenberg
Wayne Tichbon
Darrel J. Wilson
Catherine A. Heath
Assignee (at issue)
Worsley Alumina Pty. Ltd.
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.