IHS Chemical Week

EnviroTech :: Regulatory

Sumitomo Sues Syngenta

1:03 PM MST | February 4, 2008 | Chemical Week Editorial Staff

Sumitomo Chemical says it has filed complaints against Syngenta for allegedly violating Sumitomo’s invention patent for the insecticide clothianidin. The company filed the complaints with the U.S. International Trade Commission (ITC; Washington) and the U.S. District Court for Western Wisconsin. Sumitomo has filed a separate complaint against Syngenta Crop Protection with the U.S. District Court for Northern California, alleging that Syngenta’s later use patent on clothianidin is invalid. Sumitomo says it filed the complaint because Syngenta is...

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