MP Materials Sues USA Rare Earth, Alleging Theft of Rare-Earth Permanent Magnet Technology
MP Materials has filed a lawsuit against USA Rare Earth, with the core allegation centering on the improper acquisition of its proprietary rare-earth permanent magnet “grain boundary diffusion” technology. The three sources align on the facts that a lawsuit has been filed and that the dispute involves grain boundary diffusion technology. On the specific leakage path, only Source 1 mentions a former employee/former engineer allegedly sharing related formulations with USAR; the other sources do not mention this detail.