Granted Patent
Utility
US 5,809,945 · App. 08/513,429
Drain-and-fill methods and apparatus for automotive cooling systems
Inventors:
Richard F. Creeron, Norman D. Berke, Jerry Motard
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Aug 10, 1995
Inventors
Richard F. Creeron
Norman D. Berke
Jerry Motard
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.