Protein Technologies International, Inc., a subsidiary of Corteva, Inc., is an American company located in St. Louis, MO, that supplies soy proteins to the food and paper processing industries. It was acquired by E.I. du Pont de Nemours & Co., now part of Corteva, Inc. from Nestl�� Purina PetCare Co. on December 03, 1997 for $1,500 million.