Method of making an abrasion resistant steel
CA 2033222 A1 · Owner: Kunisada, Yasunobu · Inventors: Kunisada, Yasunobu; Shikanai, Nobuo; Hirabe, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of making an abrasion resistant steel consisting of the steps of: heating a slab having a chemical composition of about 0.05 to 0.45 wt.% C 0.1, to 1.0 wt.% Si, 0.1 to 2.0 wt.% Mn 0.05 to 1.5 wt.% Ti and the, balance Fe to 1000 to 1300 °C hot rolling a slab into a hot, rolled product of which finishing temperature is the Ar3 point to 1000 °C and directly quenching the hot rolled product or, air cooling and reheating above the Ac3 point followed by quenching the hot rolled product, or air cooling the hot rolled product, or directly quenching and tempering the hot rolled product at below the Ac1 point, air cooling and reheating the hot rolled product at above …
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 December 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.