Granted Patent
Utility
US 5,540,327 · App. 08/067,271
Antifreeze/coolant replacement kit
Inventor:
Richard F. Creeron
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: May 24, 1993
Inventor
Richard F. Creeron
Assignee (at issue)
Prestone Products LLC
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.