Granted Patent
Utility
US 4,421,598 · App. 06/360,595
Bleaching procedure using chlorine dioxide and chlorine solutions
Inventor:
Douglas W. Reeve
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Mar 22, 1982
Inventor
Douglas W. Reeve
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.