Granted Patent
Utility
US 6,758,976 · App. 10/082,564
Simplified purification of phosphoric acid plant pond water
Inventors:
Dennis H. Michalski, Kenneth J. Jardine, Vaughn V. Astley
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Feb 21, 2002
Inventors
Dennis H. Michalski
Kenneth J. Jardine
Vaughn V. Astley
Assignee (at issue)
IMC Global Operations Inc.
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.