Granted Patent
Utility
US 4,751,330 · App. 07/026,828
Process for preparing (hydrocarbylthio) aromatic amines
Inventor:
Robert L. Davis
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Mar 17, 1987
Inventor
Robert L. Davis
Assignee (at issue)
Ethyl Corporation
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.