Granted Patent
Utility
US 6,790,337 · App. 10/129,985
Method and device for operating an electrolytic cell
Inventors:
Silja Bjerke Vestre, Morten Friis Karlsen
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Sep 16, 2002
Inventors
Silja Bjerke Vestre
Morten Friis Karlsen
Assignee (at issue)
NORSK HYDRO ASA
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.