Granted Patent
Utility
US 4,978,517 · App. 07/316,879
Process for the production of chlorine dioxide
Inventors:
Maria Norell, Bjorn H. Svedin
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Feb 28, 1989
Inventors
Maria Norell
Bjorn H. Svedin
Assignee (at issue)
Eka Nobel AB
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.