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DuPont/BASF clash over Optimum GAT

BASF and DuPont have sued each other over alleged patent infringements related to DuPont’s Optimum GAT herbicide tolerance technology. DuPont claims that BASF biotechnology traits similar to Optimum GAT infringe four DuPont patents covering tolerance to acetolactate synthase (ALS) inhibitors. BASF charges that DuPont’s genetically modified Optimum GAT maize incorporates a BASF patented promoter that is important in conferring tolerance to ALS inhibitors. The BASF patent was issued to its legacy company, American Cyanamid, in 1998.

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