Granted Patent
Utility
US 4,679,727 · App. 06/896,054
Thermostatic steam trap with self-centering valve
Inventor:
Thomas Alesson
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Aug 13, 1986
Inventor
Thomas Alesson
Assignee (at issue)
Nicholson Division, Datron Systems, 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.