Granted Patent
Utility
US 4,300,010 · App. 06/144,887
Production of ethylbenzene
Inventor:
John L. Cihonski
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Apr 29, 1980
Inventor
John L. Cihonski
Assignee (at issue)
El Paso Products 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.