Chlorination control system
CA 1308913 C · Owner: Meredith, Michael D. · Inventors: Meredith, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system and method of controlling the chlorination of pulp includes first and second mixers with chlorine additions to each mixer under the control of a flow controller. Chlorine is added under the control of the flow controller to the pulp in the first mixer to achieve a predetermined chlorination factor in response to a signal from a brightness sensor operating in a region where brightness is linearly responsive to the chlorination factor. The chlorinated pulp stream is fed to a second mixer where chlorine is added in relation (e.g. proportion) to the quantity of chlorine added into the first mixer to achieve a higher predetermined chlorination factor which is in a region where …
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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
- Granted October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
- 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.