Granted Patent
Utility
US 4,553,587 · App. 06/523,371
Backflush coupling and method for internal combustion engine cooling system
Inventor:
Paul L. Traylor
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Aug 15, 1983
Inventor
Paul L. Traylor
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.