Heat-resistant austenitic stainless steel
CA 2010174 C · Owner: Nisshin Steel Company, Ltd. · Inventors: Hiramatsu, Naoto; Uematsu, Yoshihiro; Shimizu, Isami
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat-resistant austenitic stainless steel is disclosed. This steel essentially consists of: not more than 0.06% C, 1 - 4% Si, 0.5 - 4% Mn, not more than 0.035% P, not more than 0.005% S, 10 - 17% Ni 14 - 20% Cr, 1 - 4%, Mo, 0.01 - 0.5% A8 not more than 0.035% N, and balance, essentially Fe and may further contain small amounts of any of Cu, REM and B and the composition thereof is adjusted so that a limited amout of .delta. -ferrite appears in solidification. The steel has excellent hot salt corrosion resistance, weldability, salt errosion resistance of the weld and hot-workability.
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 February 15, 1990 and granted September 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.