Granted Patent
Utility
US 4,505,231 · App. 06/589,948
Water heater construction with sediment removal means
Inventor:
Rodney R. Syler
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Mar 15, 1984
Inventor
Rodney R. Syler
Assignee (at issue)
Apcom, 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.