Patents by Inventor Robert C. Ringwood

Robert C. Ringwood has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid organotinthioalkanol stabilizer compositions and vinyl halide resin compositions containing the same
    Patent number: 5109046
    Abstract: This invention relates to heat and light stabilizer compositions for vinyl halide resin compositions comprising organotinthioalkanol compounds that are stabilized against gelation and precipitation, to methods of preparing the stabilizer compositions, and to stabilized vinyl halide resin compositions.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: April 28, 1992
    Assignee: Atochem North America, Inc.
    Inventors: William A. Larkin, Robert C. Ringwood, Matthew T. Stershic