Granted Patent
Utility
US 5,492,173 · App. 08/028,963
Plug or lock for use in oil field tubular members and an operating system therefor
Inventors:
Marion D. Kilgore, Imre I. Gazda, David L. Reesing, John H. Yonker
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Mar 10, 1993
Inventors
Marion D. Kilgore
Imre I. Gazda
David L. Reesing
John H. Yonker
Assignee (at issue)
Halliburton
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.