Granted Patent
Utility
US 4,754,072 · App. 07/023,182
Preparation of thiophenols from phenols
Inventor:
Elliott Bay
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Mar 9, 1987
Inventor
Elliott Bay
Assignee (at issue)
Stauffer Chemical Company
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.