Abrasion resistant steel
CA 2033267 C · Owner: Kunisada, Yasunobu · Inventors: Sanpei, Tetsuya; Shikanai, Nobuo; Kunisada, Yasunobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An abrasion resistant steel is provided with approximately 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 as the basic elements cotributing to the enhancement of the abrasion resistance property without excessively increasing the hardness of the steel, In addition to the basic elements at least one, element selected from the group consisting of 0.1 to 2.0 wt.% Cu, 0.1 to 10.0 wt.% Ni, 0.1 to 3.0 wt;% Cr 0.1 to 3.0, wt.% Mo and 0.0003 to 0.01 wt.% B may be added to enhance the quenching hardenability of the steel and at least one, element selected from the group consisting of 0.005 to 0.5 wt.% Nb and 0,01 to 0.5 wt:% V may be added to …
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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 27, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term 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
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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.