Granted Patent
Utility
US 4,497,972 · App. 06/540,931
Process for the separation of ethylbenzene
Inventors:
Richard W. Neuzil, Simon H. Hobbs
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Oct 11, 1983
Inventors
Richard W. Neuzil
Simon H. Hobbs
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.