Granted Patent
Utility
US 5,919,739 · App. 08/553,285
Plugging liquid for plugging a subterranean formation zone
Inventors:
Egil Sunde, Hans Konrad Johnsen
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: Nov 28, 1995
Inventors
Egil Sunde
Hans Konrad Johnsen
Assignee (at issue)
Den Norske Stats Oljeselskap A.S.
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.