Granted Patent
Utility
US 4,954,466 · App. 07/443,281
Recovery of cobalt catalyst values
Inventor:
Robert B. Weisenfeld
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Nov 30, 1989
Inventor
Robert B. Weisenfeld
Assignee (at issue)
Monsanto Company
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.