Method and apparatus for simplified production of heat treatable aluminum alloy castings with artificial self-aging
CA 2398600 A1 · Owner: Garza-Ondarza, Oscar · Inventors: Mojica-Briseno, Juan Francisco; Valtierra-Gallardo, Salvador; Garza-Ondarza, Oscar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Simplified heat-treatment in making aluminum alloys castings of the type improved by aging, especially for automotive engine cylinder heads and motor blocks. The castings, after solidification and extraction form their molds each have en end product (workpiece) portion and a riser portion (the latter being ultimately cut off as waste). The workpiece portion of the casting is selectively quenched from solution temperatures down to about 120 ~C by spraying water or other appropriate liquid preferably as a gas driven mist onto the surfaces of the workpiece while maintaining the riser portion of the casting essentially unsprayed at relatively significantly higher temperatures. After the …
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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 December 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2022.
- 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.