Granted Patent
Utility
US 4,817,962 · App. 07/138,667
Universal tubular connection having a variable metal-to-metal seal width corresponding to material yield strength
Inventors:
Keith C. Mott, Gary E. Kirsch, H. Paul Barringer, Lawrence Y. Tung
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Dec 28, 1987
Inventors
Keith C. Mott
Gary E. Kirsch
H. Paul Barringer
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.