Reexamination Certificate for Lithium Iron Phosphate Patent 640 Is Published
Green Car Congress
MAY 13, 2009
In 2006, Hydro-Quebec filed suit against Valence Technology and A123Systems for infringement of two patents behind rechargeable lithium iron phosphate-based batteries with a particular crystal structure: the 5,910,382 patent, issued on 8 June 1999, and the 6,514,640 patent, issued on 4 February 2003.
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