Granted Patent
Utility
US 4,807,578 · App. 07/094,144
Apparatus for cleaning fuel injectors and combustion chambers
Inventors:
Lawrence J. Adams, Thomas R. Fruda, Paul D. Hughett
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Sep 8, 1987
Inventors
Lawrence J. Adams
Thomas R. Fruda
Paul D. Hughett
Assignee (at issue)
PETRO CHEMICALS CO., LTD.
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.