Granted Patent
Utility
US 4,780,304 · App. 07/013,020
Acid introduction in chlorine dioxide production
Inventors:
Edward J. Bechberger, Colin R. McGregor
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Feb 9, 1987
Inventors
Edward J. Bechberger
Colin R. McGregor
Assignee (at issue)
Tenneco Canada Inc.
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.