Simultaneous monitoring of multiple water treatment performance indicators
CA 2090820 C · Owner: Schlager, Kenneth J. · Inventors: Engstrom, Gary G.; Kye, Larry M.; Brickhouse, Mark D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for simultaneously measuring the concentration of multiple performance indicators in an aqueous system comprising analyzing the spectrum of the aqueous system in the wavelength range 200 to 2500 nm and applying chemometrics algorithms to the spectrum to simultaneously determine the concentrations of the performance indicators,
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 2, 1993 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.