Granted Patent
Utility
US 5,120,661 · App. 07/485,867
Method for detection and quantitative analysis for water treatment chemicals
Inventors:
Gary L. Baker, Ronald J. Christensen
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Feb 23, 1990
Inventors
Gary L. Baker
Ronald J. Christensen
Assignee (at issue)
DIVERSEY, 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.