Granted Patent
Utility
US 4,280,819 · App. 06/145,369
Diesel fuel compositions containing certain azides for improved cetane number
Inventors:
Robert J. Hartle, Gary M. Singerman
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Apr 30, 1980
Inventors
Robert J. Hartle
Gary M. Singerman
Assignee (at issue)
Gulf Research & Development Company
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.