Granted Patent
Utility
US 4,836,830 · App. 07/106,899
Rare earth compositions for diesel fuel stabilization
Inventors:
Peter S. Gradeff, John F. Davison
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: May 18, 1988
Inventors
Peter S. Gradeff
John F. Davison
Assignee (at issue)
Rhone-Poulenc, 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.