Granted Patent
Utility
US 5,340,488 · App. 07/595,584
Composition for cleaning an internal combustion engine
Inventors:
Lawrence J. Adams, Thomas R. Fruda, Paul D. Hughett
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Oct 11, 1990
Inventors
Lawrence J. Adams
Thomas R. Fruda
Paul D. Hughett
Assignee (at issue)
Petro Chemical Products, 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.