Granted Patent
Utility
US 4,446,006 · App. 06/377,615
Arsenic removal from hydrocarbons
Inventor:
Walter Albertson
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: May 13, 1982
Inventor
Walter Albertson
Assignee (at issue)
Union Oil Company of California
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.