Precipitation-hardenable tool steel
CA 2043146 C · Owner: Norstrom, Lars-Ake · Inventors: Jespersson, Henrik; Norstrom, Lars-Ake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a precipitation-hardenable tool steel intended for plastic forming tools manufactured therefrom. The tool steel at the manufacturing of the tool and prior to hardening through ageing treatment but after solution heat treatment and cooling to room temperature has a hardness less than 40 HRC but after the manufac-, turing of the tool and the subsequent age hardening treatment i.e. in, the precipitation hardened condition is harder than 45 HRC and has a, high corrosion resistance and a toughness sufficient for plastic forming tools. The steel contains in weight %: max 0.08 C, max 1 Si, max 2 Mn, 9 - 13 Cr 7 - 11 Ni, max 1 Mo, 1.4 - 2.2 Al, and balance being essentially …
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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 May 23, 1991 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2013.
- 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.