Granted Patent
Utility
US 5,110,491 · App. 07/688,801
Oligomeric lubricant additive designed to enhance antioxidancy and corrosion resistance in railway diesel crankcase lubricants
Inventors:
Thomas F. DeRosa, Rodney L. Sung, Benjamin J. Kaufman, Ronald L. O'Rourke
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Apr 22, 1991
Inventors
Thomas F. DeRosa
Rodney L. Sung
Benjamin J. Kaufman
Ronald L. O'Rourke
Assignee (at issue)
Texaco 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.