Process for producing permanent magnet materials
CA 1287750 C · Owner: Fujimura, Setsuo · Inventors: Fujimura, Setsuo; Matsuura, Yutaka; Sagawa, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Permanent magnet materials of the Fe-B-R type are produced by:, preparing a metallic powder having a mean particle size of 0.3 - 80 microns and a composition of 8 - 30 at % R 2 - 28 at %, B, and the balance Fe, compacting and, sintering, at a temperature of 900 - 1200 degrees C. Co up to 50 at % may be present. Additional elements M (Ti Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb Ge, Sn, Zr, Hf) may be, present. The process is applicable for anisotropic and isotropic magnet materials.
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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
- Granted August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
- 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.