Granted Patent
Utility
US 5,371,303 · App. 08/213,767
One-step preparation of 4,6-dinitroresorcinol from resorcinol
Inventors:
William J. Kruper, Jr., Zenon Lysenko, John W. Hull, Jr., George J. Frycek
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Mar 16, 1994
Inventors
William J. Kruper, Jr.
Zenon Lysenko
John W. Hull, Jr.
George J. Frycek
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.