Thixocast casting material, process for preparing thixocast semi-molten casting material, thixocasting process, fe-based cast product, and process for thermally treating fe-based cast product
CA 2236639 C · Owner: Sugawara, Takeshi · Inventors: Sugawara, Takeshi; Takagi, Isamu; Shiina, Haruo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thixocast casting material is formed of an Fe-C-Si based. alloy in which an angle endothermic section due to the melting of a eutectic crystal exists in a latent heat distribution curve and has a eutectic crystal amount Ec in a range of 10 % by weight < Ec < 50 % by weight. This composition comprises 1.8 % by weight <= C <= 2.5 % by weight of carbon, 1.4 % by weight <= Si <= 3 % by, weight of silicon and a balance of Fe including inevitable impurities.
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 September 2, 1997 and granted November 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2019.
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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.