Granted Patent
Utility
US 4,243,637 · App. 05/840,791
Uranium recovery from pre-treated phosphoric acid
Inventors:
James L. Bradford, Fernando Ore
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Oct 11, 1977
Inventors
James L. Bradford
Fernando Ore
Assignee (at issue)
Occidental Petroleum
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.