1Jul 20, 1993Nippon Oil And Fats Co., Ltd.Coated vitamin c preparation for animal feed, production and use thereofUS5230836Jun 20, 1991Jul 27, 1993Kalamazoo Holdings, Inc.Low micron-sized ascorbic acid particles, especially a suspension thereof in a medium in which they are insoluble, and the use thereof as an antioxidant for mediums in which the particles remain insolubleUS5230916Dec 23, 1991Jul