Method and apparatus for monitoring and controlling characteristics of process effluents
CA 2282344 A1 · Owner: Alberta Research Council Inc. · Inventors: Garver, Theodore M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for monitoring and controlling a characteristic of process waters or effluent from wood pulp bleaching, pulping and paper making processes utilizing a bleaching agent such as hydrogen peroxide (H2O2) Na2S2O4, ClO2, Cl2 or O3 or a pulp delignification process utilizing a delignification agent such as NaOH, Na2S, O2, Na2SO3, and various enzymes including ligninase xylanase, mannanase, laccase, and peroxidase. The method comprises the steps of obtaining at least two measurements of ultraviolet light absorption of the effluent, by taking a first measurement measured at a first wavelength and a , second measurement measured at a second wavelength then determining a ratio , of the …
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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 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.