Granted Patent
Utility
US 6,450,505 · App. 09/358,964
Seal for casting in a concrete wall of a fluid distribution system container
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Jul 22, 1999
Inventor
Norman W. Gavin
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.