Granted Patent
Utility
US 4,333,801 · App. 06/289,591
Recovery of a cumene/alpha-methylstyrene fraction from a mixture thereof with phenol and water
Inventor:
Peter R. Pujado
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Aug 3, 1981
Inventor
Peter R. Pujado
Assignee (at issue)
UOP LLC
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.