Granted Patent
Utility
US 5,338,074 · App. 08/133,783
Threaded pipe connection
Inventors:
H. Paul Barringer, Gary E. Kirsch, Keith C. Mott, Lawrence Y. Tung
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Oct 8, 1993
Inventors
H. Paul Barringer
Gary E. Kirsch
Keith C. Mott
Lawrence Y. Tung
Assignee (at issue)
Hydril Company
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.