Method for inhibiting aluminum-based deposition in water systems
CA 1261228 A · Owner: Betzdearborn Inc. · Inventors: Peerce-Landers, Pamela J.; Wisener, Allison T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of controlling deposition and fouling in an aqueous mediums, such as in cooling water systems wherein aluminum species, are present in the system water. Normally such aluminum species, presence is caused by clarifier upsets and the like which in turn cause A1+3 contamination of the cooling system makeup water. The method comprises addition of certain water soluble acrylic acid type/ allyl hydroxy propyl sulfonate ether copolymers to the system.
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.