17 November 2011 22:53 [Source: ICIS news]
HOUSTON (ICIS)--A US appeals court upheld a July 2010 jury decision, which found that a joint venture made up of DuPont and Air Products did not infringe on the patents of Cabot Microelectronics, the joint venture said on Thursday.
The dispute concerned chemical mechanical planarisation (CMP) slurries made by the joint venture, called DuPont Air Products NanoMaterials (DA NanoMaterials), the joint venture said.
The case dates back to January 2007, when Cabot Microelectronics filed the enforcement action against DA Nano, accusing the joint venture of infringing on its patents for tungsten CMP.
Cabot Microelectronics sought damages and injunctive relief against DA Nano.
The case was initially filed in the US District Court for the district of Arizona.
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