Magnetic materials and permanent magnets
CA 1315571 C · Owner: Sagawa, Masato · Inventors: Fujimura, Setsuo; Sagawa, Masato; Matsuura, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Magnetic materials comprising Fe, B, R (rare earth elements) and Co having a major phase of Fe-Co-B-R intermetallic compound(s) of tetragonal system and sintered, anisotropic permanent magnets consisting essentially of by, atomic percent, 8 - 30 % R (at least one of rare earth elements inclusive of Y), 2 - 28 % B, no less than 50 % Co and the balance being Fe with impurities. Those may contain additional elements M (Ti, Ni, Bi, V, Nb Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) providing Fe-Co-B-R-M type materials and magnets.
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 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- 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.