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US court says M&G infringed Invista's PolyShield patent

7:16 AM MDT | August 23, 2013

A US district court has ruled that US-based subsidiaries of the M&G Group have infringed a patent, US 7943216, behind Invista’s PolyShield resin, Invista says. Invista says the ruling “resolves questions regarding ongoing allegations of infringement with respect to M&G’s PoliProtect APB and JB resin manufactured, offered for sale, and sold in the United States.” Invista filed the suit in October 2011, five months after the patent was issued by the US Patent and Trademark Office. The patent describes a blend of polyester and a...

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