Granted Patent
Utility
US 4,929,770 · App. 07/320,540
Aluminum phenoxide catalyst removal
Inventors:
Charles W. Matthews, Eric Batman, Jeffrey F. King
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Mar 8, 1989
Inventors
Charles W. Matthews
Eric Batman
Jeffrey F. King
Assignee (at issue)
Ethyl Corporation
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.