Duplex steel alloy
CA 2459253 A1 · Owner: Sandvik Intellectual Property Ab · Inventors: Kangas, Pasi; Sundstroem, Ann; Nystroem, Anna-Lena
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a stainless steel alloy closer determined a , duplex stainless steel alloy with ferritic-austenitic matrix and with high resistance to corrosion in combination with good structural stability and hotworkability, in paricular a duplex stainless steel with a content of ferrite of 40-65% and a well balanced compositon that imparts material corrosion properties, which makes it is more suitable for use in chloridecontaining environments than earlier been considered being possible. The total PRE- or PREW-number exceeds 44 a PRE-number on at least between 46 and 50 in both the austenite phase and the ferrite phase whereby PRE = %Cr + 3,3%Mo + , 16N and PREW = …
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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 September 2, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2024.
- 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.