Polyarylene sulfide resin composition less corrosive to metals
CA 2074973 A1 · Owner: Muneto, Toshihiko · Inventors: Kato, Toshikazu; Muneto, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Addition of zeolites ion-exchanged with specific metal ion species to polyarylene sulfide resins reduces significantly the corrosive properties to metals without, substantially adversely affecting the desirable properties of the resins. The zeolites are ion-exchanged with at least one metal ion species selected from Cr Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Sn and Mg.
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 July 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2014.
- 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.