Granted Patent
Utility
US 4,553,979 · App. 06/661,222
Diesel fuel compositions
Inventors:
J. Vincent Hanlon, Denis L. Lenane, James B. Retzloff
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Oct 15, 1984
Inventors
J. Vincent Hanlon
Denis L. Lenane
James B. Retzloff
Assignee (at issue)
Ethyl Petroleum Additives, Inc.
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.