Granted Patent
Utility
US 5,633,798 · App. 08/423,074
Method and apparatus for measuring octane number
Inventor:
Vance R. Kopp
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: Apr 13, 1995
Inventor
Vance R. Kopp
Assignee (at issue)
Phillips Petroleum 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.