Preparation of weak acid cation exchange resins
CA 2387552 A1 · Owner: Bohling, James Charles · Inventors: Lundquist, Eric Gustave; Bohling, James Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for cleaning weak acid cation exchange resin intermediates resulting in finished weak acid resins providing enhanced performance of mixed-bed water-treatment systems is disclosed. The cleaning process involves selected steam treatment during the manufacturing process of the resins and is applicable to weak acid cation exchange resins in general that, are used as components in potable water treatment systems such as cartridge-, water-pitcher systems.
Read the whole patent
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 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2024.
- 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.