Granted Patent
Utility
US 4,404,098 · App. 06/446,894
Mercaptan extraction process with recycled alkaline solution
Inventor:
George Asdigian
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Dec 6, 1982
Inventor
George Asdigian
Assignee (at issue)
UOP LLC
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.