Granted Patent
Utility
US 5,772,897 · App. 08/716,271
Continuous oxidation process using a hypochlorite solution
Inventor:
Frederick Ernest Hancock
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 23, 1996
Inventor
Frederick Ernest Hancock
Assignee (at issue)
IMPERIAL CHEMICAL 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.