Die-upset manufacture to produce high volume fractions of re-fe-b type magnetically aligned material
CA 1319309 C · Owner: General Motors Corporation · Inventors: Lee, Robert W.; Brewer, Earl G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
C-4012, DIE-UPSET MANUFACTURE TO PRODUCE HIGH VOLUME FRACTIONS OF RE-Fe-B, TYPE MAGNETICALLY ALIGNED MATERIAL Abstract of the Disclosure, A method to increase the volume fraction of magnetically aligned material in rare earth (RE) iron, boron type anisotropic permanently magnetic material includes forming an adaptively shaped fully dense substantially magnetically isotropic preform from relatively coarse powder particles of melt spun alloy with a very fine grain RE2Fe14B phase. The preform is heated and die upset to provide uniformity of strain in the preform as it is conformed to the die thereby to cause an increased percentage of the crystallites to be oriented along a …
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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 June 22, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 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.