Granted Patent
Utility
US 4,894,477 · App. 06/918,740
Process for regenerating a carbonylation catalyst solution to remove corrosion metals and carbonylation of methanol to acetic acid
Inventors:
Mark O. Scates, G. Paull Torrence, Ronny G. Wood
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Oct 14, 1986
Inventors
Mark O. Scates
G. Paull Torrence
Ronny G. Wood
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.