Granted Patent
Utility
US 5,723,419 · App. 08/716,003
Engine treatment composition
Inventors:
James Czerwinski, James P. Heidel, Michael A. Schultz
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Sep 19, 1996
Inventors
James Czerwinski
James P. Heidel
Michael A. Schultz
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.