Granted Patent
Utility
US 6,685,840 · App. 10/066,168
Method for determining the dissolution rate of a solid water treatment product
Inventor:
Steven R. Hatch
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Jan 31, 2002
Inventor
Steven R. Hatch
Assignee (at issue)
Ondeo Nalco Company
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.