Granted Patent
Utility
US 4,397,785 · App. 06/248,384
Preparation of 3,3'5,5'-tetratertiary butyl diphenoquinone
Inventor:
Robert M. Strom
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Mar 27, 1981
Inventor
Robert M. Strom
Assignee (at issue)
THE DOW 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.