Granted Patent
Utility
US 4,573,489 · App. 06/680,896
Dump valve
Inventors:
Lewis M. Carlton, Bob L. O'Mary, Teddy H. Cruse
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Dec 12, 1984
Inventors
Lewis M. Carlton
Bob L. O'Mary
Teddy H. Cruse
Assignee (at issue)
Murphy Management, 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.