Austenitic stainless steel
CA 2033287 C · Owner: Stenvall, Peter · Inventors: Wallen, Bengt; Liljas, Mats; Stenvall, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an austenitic stainless steel having a high tensile strength, a high impact strength a good weldability and a, high corrosion resistance particularly a high resistance to pitting and crevice corrosion. The steel contains in weight-%: max 0.08 C, max 1.0 Si, more than 0.5 but less than 6 Mn more than 19 but not more than 28 Cr, more than 17 but not more than 25 Ni more than 7 but not more than 10 Mo, 0.4 - 0.7 N from traces up to 2 Cu, 0 - 0.2 Ce, balance essentially only iron impurities and accessory elements in, normal amounts.
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 and granted August 21, 2001. 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
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.