Granted Patent
Utility
US 5,540,255 · App. 08/426,084
Thermal insulation for P-trap piping
Inventors:
Steven R. Trueb, Thomas W. Trueb
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Apr 21, 1995
Inventors
Steven R. Trueb
Thomas W. Trueb
Assignee (at issue)
Truebro, 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.