Ionic contaminants removal from polymer cements using a molten component
CA 2254073 A1 · Owner: Veith, Cary Alan · Inventors: Malven, William Charles; Potter, Michael Wayne; Veith, Cary Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for removing ionic contaminants from a polymer cement containing ionic contaminants comprising: i) contacting the polymer cement with a molten component capable of reacting with the ion contaminants; and ii) separating the molten component from the polymer cement so obtained.
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 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2019.
- 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.