Water treatment process
CA 2294129 C · Owner: Applied Specialties, Inc. · Inventors: Scheurman, Clarence Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved water softening process is provided which also reduces anion content. A first stream of water (30) is passed through an anion-exchange unit (40, 41, 42) to remove undesirable anions and raise the pH. The first stream of water is then provided to reactor/clarifier water softening equipment (20 21, 33), where it acts as a source of hydroxyl ions. Preferably a second stream of water (32) which did not pass through an anion-exchange unit is also provided to the water softening equipment. The streams of water are combined and processed through the softening equipment where hardness ions are , precipitated out yielding softened water with reduced anion content. 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 June 18, 1998 and granted September 13, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2020.
- 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.