Granted Patent
Utility
US 5,435,521 · App. 08/255,747
Ball valve with rinsing action
Inventor:
Frank E. Jarecki
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: Jun 7, 1994
Inventor
Frank E. Jarecki
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.