Granted Patent
Utility
US 4,898,846 · App. 06/842,519
Cracking catalysts with octane enhancement
Inventors:
Grant C. Edwards, Alan W. Peters
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Mar 21, 1986
Inventors
Grant C. Edwards
Alan W. Peters
Assignee (at issue)
W.R. Grace & Co. Conn.
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.