Granted Patent
Utility
US 6,556,014 · App. 09/719,635
Device and method for measurement by guided waves on a metal string in a well
Inventors:
Fan-Nian Kong, Harald Westerdahl, Terje Eidesmo, Svein Ellingsrud
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Mar 6, 2001
Inventors
Fan-Nian Kong
Harald Westerdahl
Terje Eidesmo
Svein Ellingsrud
Assignees (at issue)
Den Norske Stats Oljeselskap A.S.
Norges Goetekniske Institutt
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.