Granted Patent
Utility
US 6,187,064 · App. 08/312,048
Unleaded aviation gasoline
Inventor:
Douglas H. Henderson
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Sep 26, 1994
Inventor
Douglas H. Henderson
Assignee (at issue)
Ethyl Petroleum Additives, 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.