Granted Patent
Utility
US 4,377,560 · App. 06/282,466
Process for producing low aluminum content phosphoric acid from high aluminum matrix
Inventor:
Fernando Ore'
Patented Case
View Patent ↗
Granted: Mar 22, 1983
Filed: Jul 13, 1981
Inventor
Fernando Ore'
Assignee (at issue)
Occidental Research 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.