Fe-ni alloy pipe stock and method for manufacturing the same
CA 2572156 C · Owner: Yamakawa, Tomio · Inventors: Amaya, Hisashi; Igarashi, Masaaki; Yamakawa, Tomio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An Fe-Ni alloy pipe stock having a chemical composition comprising by mass %, C <= 0.04%, Si <= 0.50%, Mn: 0.01 to 6.0% P <= , 0.03%, S <= 0.01%, Cr: , 20 to 30% Ni: 30 to 45%, Mo: 0 to 10%, W: 0 to 20% with Mo(%) + 0.5W(%): , more than 1.5% to not more than 10% Cu: 0.01 to 1.5%, Al <= 0.01% and , N: 0.0005 to 0.20%, and the balance substantially being Fe with 1440 - 6000P , - 100S - 2000C >= 1300 Ni + 10(Mo + 0.5W) + 100N <= 120, (Ni - 35) + , 10(N - 0.1) - 2(Cr - 25) - 5(Mo + 0.5W - 3) + 8 >= 0 can be , manufactured into a , seamless pipe by use of a Mannesmann piercing and rolling mill because of its excellent inner surface properties. The resulting seamless pipe has excellent …
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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 June 29, 2005 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.