Sequestering
CA 2406382 A1 · Owner: Raaijmakers, Henricus Wilhelmus Carolina · Inventors: Raaijmakers, Henricus Wilhelmus Carolina; Kuzee, Hendrika Cornelia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for sequestering metal ions at a low pH. Surprisingly, it has been found that certain fructan polycarboxylic acids as , opposed to the generally used sequestering agents are capable of complexing , metal ions in an efficient manner at a pH lower than 6. Additionally the , invention relates to a cleaning composition containing a fructan polycarboxylic acid as sequestering agent.
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 April 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2023.
- 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.