Treatment of thermoplastic materials with chelating agents, and related products
CA 2389509 A1 · Owner: M. Argueso & Co. Inc. · Inventors: Muschio, Henry M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The metal content of a thermoplastic composition containing an undesirably high concentration of metal can be reduced by adding to 100 parts by weight of the composition at least about 0.3 parts by weight of a chelating agent and sufficient water to chelate metal in the composition to form chelated metal in the composition, and then removing at least some of the chelated metal from the composition.
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 October 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2022.
- 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.