Granted Patent
Utility
US 4,906,251 · App. 07/270,967
Gasoline additive
Inventors:
Otto Weil, Gerald G. Smith
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Nov 14, 1988
Inventors
Otto Weil
Gerald G. Smith
Assignee (at issue)
Gold Eagle Co.
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.