Granted Patent
Utility
US 4,394,355 · App. 06/354,251
Recovery of catalytically-useful cobalt and like metal moieties from their solid oxalates with EDTA salts
Inventor:
James D. Fruge'
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Mar 2, 1982
Inventor
James D. Fruge'
Assignee (at issue)
Celanese GmbH
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.