Non-sintered permanent magnet of substantially stoichiometric alloy particulate material and method of production thereof
CA 1311667 C · Owner: University Of Birmingham (The) · Inventors: Safi, Syed Hasan; Harris, Ivor Rex
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-sintered permanent magnet is formed by a cold compacting technique or by resin bonding using particles of a stoichiometric alloy (eg R2Fe14B where R is at least one rare earth and/or yttrium, particularly La Ce, Pr, Nd or Y or a mixture thereof) which have been coated with a reaction product of the alloy or a non-magnetic metal such as Sn, Ga, Zn, Al or Cu. The, use of a stoichiometric alloy avoids the presence of a reactive grain boundary phase normally present in non-stoichiometric alloys.
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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 December 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 2009.
- 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.