Granted Patent
Utility
US 4,324,920 · App. 06/172,977
Process for the preparation of ortho-(hydrocarbylthio)-phenols
Inventors:
Bonnie G. McKinnie, Paul F. Ranken
Patented Case
View Patent ↗
Granted: Apr 13, 1982
Filed: Jul 28, 1980
Inventors
Bonnie G. McKinnie
Paul F. Ranken
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.