Granted Patent
Utility
US 5,207,995 · App. 07/584,729
Recovery of cerium from fluoride-containing ores
Inventor:
Paula J. Bosserman
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Sep 19, 1990
Inventor
Paula J. Bosserman
Assignee (at issue)
Union Oil Company of California
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.