Sm.sub.2co in17 xx alloys suitable for use as permanent magnets
CA 1252310 A · Owner: Clegg, Maurice A. · Inventors: Wysiekierski, Andrew G.; Fraser, Robert W.; Clegg, Maurice A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An Sm2Co17 alloy contains by weight 22.5 to 23.5% Sm as an effective amount, 20.0 to 25.0% Fe 3.0, to 5.0% Cu, 1.4 to 2.0% Zr as an effective amount minor, amounts of oxygen and carbon, an additional amount of Sm in the range of from about 4 to about 9 times the oxygen content of the alloy, an additional amount of Zr in the range of from about 5 to about 10 times the carbon content of the alloy, the balance being cobalt. The alloy has a crystallographic structure comprising cells of 2-17 Sm-Co rhombohedral phase surrounded by a continuous network of the 1-5 Sm-Co nexagonal phase.
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
- Granted April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.