Granted Patent
Utility
US 4,154,809 · App. 05/893,463
High efficiency chlorine dioxide production using HCl as acid and methanol addition
Inventors:
Richard Swindells, Maurice C. J. Fredette
Patented Case
View Patent ↗
Granted: May 15, 1979
Filed: Apr 4, 1978
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.