Granted Patent
Utility
US 4,976,835 · App. 07/406,178
Electrosynthesis of sodium dithionite
Inventors:
Leonard L. Diaddario, Jr., Mark Schroeder
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Sep 12, 1989
Inventors
Leonard L. Diaddario, Jr.
Mark Schroeder
Assignee (at issue)
Hoechst Celanese 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.