Polyoxymethylene composition and molded article thereof
CA 2136010 A1 · Owner: Sugiyama, Noriyuki · Inventors: Sugiyama, Noriyuki; Iizuka, Hiroko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To provide a polyoxymethylene composition which is improved in heat stability, particularly the generation of mold deposits during molding and malfunction due to the formic acid generated from the composition (for example, stain with the substance bleeding from a part made from a rubber and corrosion of a magnetic metal member). To 100 parts by weight of a polyoxymethylene, (a) 0.01 to 5.0 parts by weight of an antioxidant. (b) 0.01 to 5.0 parts by weight of a specific amine polymer and (c) 0.001 to 10 parts by weight of at least one metal-containing compound selected from among oxides and carbonates of magnesium and calcium are added. - 26 -
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 August 23, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2016.
- 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.