Granted Patent
Utility
US 4,876,385 · App. 07/173,711
Batch or semicontinuous pseudocumene oxidation and catalyst recovery and recycle
Inventors:
Neal R. Nowicki, Donald E. Thomka
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Mar 25, 1988
Inventors
Neal R. Nowicki
Donald E. Thomka
Assignee (at issue)
Amoco 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.