LONDON—Tate & Lyle will appeal a United States International Trade Commission ruling against them in a sucralose patent-infringement case. “This is a complex case involving a huge amount of in-depth technical analysis and debate between scientific experts. We would not have proceeded with an ITC case unless we believed we had adequate evidence to demonstrate that our patents are being infringed. We intend to petition for an appeal of the decision by the full Commission,” Robert Gibber, General Counsel for Tate & Lyle, said.