Embrittlement resistant stainless steel alloy
CA 2105456 C · Owner: Kipphut, Christine M. · Inventors: Schwant, Robin Carl; Kipphut, Christine M.; Pepe, Joseph J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a new stainless steel alloy called High Purity M152(HP M152) which has all the desired properties of those of the prior art but has unique resistance to embrittlement. Limiting phosphorus tin, antimony and arsenic in the stainless steel alloy to a little more than trace amounts provides tremendous reduction in the amount of embrittlement which occurs. Additionally reduction of the manganese and silicon contents from 0.7 and 0.3 respectively, to about 0.050% provides further benefit. This alloy can be used in steam turbine and jet engine applications as well as in gas turbines.
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 September 2, 1993 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2015.
- 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.