Granted Patent
Utility
US 4,982,002 · App. 07/379,873
Methylthio substituted diaminotoluenes
Inventors:
Bonnie G. McKinnie, Paul F. Ranken
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jul 14, 1989
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.