LONDON - (AP) Drug maker AstraZeneca says it has reached an agreement with a U.S. company to settle patent infringement litigation. AstraZeneca said Friday that Handa Pharmaceuticals of Fremont, California had accepted that AstraZeneca had valid patents for Seroquel XR for the treatment of depression. Seroquel is the third-largest selling drug. . . . Full version available to lexis.com subscribers.