Granted Patent
Utility
US 6,063,266 · App. 08/793,662
Process for removing essentially naphthenic acids from a hydrocarbon oil
Inventors:
Knut Vebjørn Grande, Carsten Sorlie
Patented Case
View Patent ↗
Granted: May 16, 2000
Filed: Feb 27, 1997
Inventors
Knut Vebjørn Grande
Carsten Sorlie
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.