Valence Technology is an Austin, Texas, company that develops and manufactures long-life lithium iron magnesium phosphate batteries.Â
The EPO initially granted European Patent Number 0904607, entitled â€œCathode materials for secondary (rechargeable) lithium batteriesâ€ (‘607 Patent) to the University of Texas; the patent is now owned by HQ.Â
Valence challenged the patent grant in an opposition proceeding filed in 2005.Â The EPO Opposition Board revoked the grant in December 2008 because the patent lacked novelty (EPO_Revocation).Â HQ appealed that decision.Â
Last month the EPO Opposition Board dismissed HQâ€™s appeal, resulting in cancellation ofÂ the patent.
The ‘607 Patent is a European relative of U.S. Patents Nos. 5,910,382, 6,514,640,Â 7,955,733, 7,960,058 and 7,964,308, entitled “CathodeÂ materials for secondary (rechargeable) lithium batteries”Â (Cathode Materials Patents).
The Cathode Materials Patents relate to host materials for use as electrodes in lithium ion batteries.Â In particular, the patents are directed to a synthesized cathode material containing a compound with an olivine structure comprising the general formula LiMPO4 where M is iron, manganese, nickel or titanium.
According to the Cathode Materials Patents, these cathode materials provide a larger free volume for lithium ion motion that allows higher conductivity and therefore greater power densities.
Valence and HQ are not strangers to litigation involving the Cathode Materials Patents.Â Read previous posts here and hereÂ aboutÂ those cases, which the parties settled asÂ part of a cross-licensing deal in October of last year.
David Gibbs is a contributor to Green Patent Blog.Â David is currently in his third and final year at Thomas Jefferson School of Law in San Diego.Â He received his undergraduate degree in Geology from the University of California, Berkeley.