Patents by Inventor Andrew C. Kolbert

Andrew C. Kolbert 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).

  • Compatibilized silica and polymer silica-reinforced masterbatch containing same
    Patent number: 5985953
    Abstract: A compatibilized silica for incorporation into natural and synthetic polymers in latex form or dry blending operations is described. Said compatibilized silica is formed by the reaction of precipitated or fumed silica with organosilicon coupling compounds in aqueous suspension. Polymer-silica reinforced masterbatches are prepared by addition of the compatibilized silica slurry to natural and synthetic polymer latices. Also described is a process for preparing the compatibilized silica.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 16, 1999
    Assignee: DSM Copolymer, Inc.
    Inventors: John W. Lightsey, David J. Kneiling, John M. Long, Andrew C. Kolbert