Method and compositions for treating recirculating water systems
CA 2190490 C · Owner: Carlyle, Stephen L. · Inventors: Jones, Ronald L.; Mitchell, Presley K.; Shelor, Susan M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel method and compositions are disclosed for the treatment of water in recirculating water systems. The method includes providing a boron level of at least 20 ppm in the water continually eroding into the water a compressed sanitizer/algicide component including a halogen source material, a boron source material and glycoluril, and periodically adding to the water an oxidizing clarifier comprising a chlorine source material, a non-halogen chlorine source material, and a boron source material. The invention also provides novel water treatment chemicals including the compressed sanitizer/algicide component and the clarifier useful in the foregoing system. The system and compositions are …
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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 May 12, 1995 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 12, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2017.
- 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
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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.