Granted Patent
Utility
US 5,010,047 · App. 07/315,662
Recovery of double metal cyanide complex catalyst from a polymer
Inventor:
Jonathan L. Schuchardt
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Feb 27, 1989
Inventor
Jonathan L. Schuchardt
Assignee (at issue)
Arco Chemical Technology, L.P.
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.