Granted Patent
Utility
US 6,039,772 · App. 08/421,281
Non leaded fuel composition
Inventor:
William C. Orr
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Apr 13, 1995
Inventor
William C. Orr
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.