Granted Patent
Utility
US 5,709,418 · App. 08/406,551
Pipe fitting with coupling body and swage ring with kickdown device to prevent reduction in sealing tooth contact force
Inventors:
Robert W. Benson, Melvin C. Biersteker, Andy Song
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: Mar 20, 1995
Inventors
Robert W. Benson
Melvin C. Biersteker
Andy Song
Assignee (at issue)
Lokring Corporation
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.