Granted Patent
Utility
US 3,943,182 · App. 05/469,163
Process for the separation of ethylbenzene by selective adsorption on a zeolitic adsorbent
Inventors:
Richard W. Neuzil, Donald H. Rosback
Patented Case
View Patent ↗
Granted: Mar 9, 1976
Filed: May 13, 1974
Inventors
Richard W. Neuzil
Donald H. Rosback
Assignee (at issue)
Universal Oil 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.