Granted Patent
Utility
US 4,853,201 · App. 07/217,186
Recovery of P.sub.2 O.sub.5 values from phosphoric acid hemihydrate crystals
Inventors:
Fernando Ore, Thomas E. Richards
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jul 11, 1988
Inventors
Fernando Ore
Thomas E. Richards
Assignee (at issue)
Occidental Chemical Corporation
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.