Granted Patent
Utility
US 4,567,915 · App. 06/579,133
Anti-cavitation low-noise control valve cage trim for high pressure reducing service in liquid or gaseous flow
Inventors:
Charles Bates, Fred Cain
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Feb 10, 1984
Inventors
Charles Bates
Fred Cain
Assignee (at issue)
Valtek, Inc.
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.