Granted Patent
Utility
US 6,182,012 · App. 09/253,535
Method and device intended for permanent monitoring of an underground formation
Inventors:
Jean Laurent, Frederic Huguet
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Feb 22, 1999
Inventors
Jean Laurent
Frederic Huguet
Assignees (at issue)
INSTITUT FRANCAIS DU PETROLE
Gaz de France-Service National
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.