Polyacetal resin composition
CA 2483070 A1 · Owner: Kawaguchi, Kuniaki · Inventors: Tajima, Yoshihisa; Okawa, Hidetoshi; Kawaguchi, Kuniaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyacetal resin composition having high rigidity and excellent dimensional stability and creep property, namely, a polyacetal resin composition comprising 99.9 to 90 parts by weight of a linear polyacetal resin (A) which is produced by copolymerizing 99.5 to 97.5 wt% of trioxane (a) with 0.5 to 2.5 wt% of a compound (b) selected from among monofunctional cyclic ethers and monofunational cyclic formals and has a melt index of 1 to 50 g/min and 0.1 to 10 parts by weight of a branched or crosslinked polyacetal resin (B) which is produced by copolymerizing 99.49 to 95.0 wt% of trioxane (a) with 0.5 to 4.0 wt% of a compound (b) selected from among monofunctional cyclic ethers and …
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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 29, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2025.
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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.