Granted Patent
Utility
US 4,871,879 · App. 07/114,171
Rhodium recovery from hydroformylation reaction product
Inventor:
Keith A. Laird
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Oct 27, 1987
Inventor
Keith A. Laird
Assignee (at issue)
Hoechst Celanese Corporation
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.