Granted Patent
Utility
US 5,626,346 · App. 08/491,770
Embedded in concrete, elastomeric seal for pipes
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Jun 19, 1995
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.