Patents by Inventor Paula R. Alves

Paula R. Alves 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).

  • Compositions comprising fine sedimentary kaolin and methods for preparing same
    Patent number: 8465583
    Abstract: Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: June 18, 2013
    Assignee: Imerys Pigments, Inc.
    Inventors: Robert J. Pruett, Paula R. Alves
  • COMPOSITIONS COMPRISING FINE SEDIMENTARY KAOLIN AND METHODS FOR PREPARING SAME
    Publication number: 20120090506
    Abstract: Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
    Type: Application
    Filed: December 21, 2011
    Publication date: April 19, 2012
    Inventors: Robert J. PRUETT, Paula R. ALVES
  • Compositions comprising fine sedimentary kaolin and methods for preparing same
    Patent number: 8083848
    Abstract: Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: December 27, 2011
    Assignee: Imerys Pigments, Inc.
    Inventors: Robert J. Pruett, Paula R. Alves