Granted Patent
Utility
US 4,325,934 · App. 06/189,703
Production of chlorine dioxide with conversion of by-product solid phase sodium acid sulphate to its neutral form
Inventors:
Richard Swindells, Maurice C. J. Fredette
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Sep 22, 1980
Inventors
Richard Swindells
Maurice C. J. Fredette
Assignee (at issue)
ERCO Industries Limited
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.