Granted Patent
Utility
US 6,499,540 · App. 09/730,891
Method for detecting a leak in a drill string valve
Inventors:
Jerome Schubert, Carmon H. Alexander, Hans C. Juvkam-Wold, Curtis E. Weddle, III, Jonggeun Choe
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Dec 6, 2000
Inventors
Jerome Schubert
Carmon H. Alexander
Hans C. Juvkam-Wold
Curtis E. Weddle, III
Jonggeun Choe
Assignees (at issue)
Conoco Inc.
THE TEXAS A&M UNIVERSITY SYSTEM
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.