Granted Patent
Utility
US 4,912,234 · App. 07/374,413
Process for the oxidation of aromatic hydrocarbons
Inventors:
Leonard A. Cullo, Elliott V. Nagle, Jr., Edward F. Restelli, Jr., Thomas J. Yogan
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jun 30, 1989
Inventors
Leonard A. Cullo
Elliott V. Nagle, Jr.
Edward F. Restelli, Jr.
Thomas J. Yogan
Assignee (at issue)
Aristech Chemical Company
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.