Granted Patent
Utility
US 4,769,488 · App. 06/790,379
Batch or semicontinuous pseudocumene oxidation and catalyst recovery and recycle
Inventors:
Neal R. Nowicki, Donald E. Thomka
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Oct 23, 1985
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.