Patents by Inventor Natacha Bonnard Pillonel

Natacha Bonnard Pillonel 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).

  • Color effect pigments and method of forming the same
    Patent number: 6984682
    Abstract: A metallic effect pigment including a metallic, corrosion resistant reflective core of reflectivity from 40% to 80%; having deposited thereupon at least one dielectric coating layer formed of at least one metal oxide, the metal oxide layer having been formed by deposition on the core by hydrolysis of a hydrolyzable metal salt in an strongly acidic aqueous medium, and thereafter full transformation into the oxide by calcination.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: January 10, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jack Polonka, Patrice Bujard, Natacha Bonnard Pillonel, Fritz Herren
  • Color effect pigments and method of forming the same
    Publication number: 20020137819
    Abstract: A metallic effect pigment including a metallic, corrosion resistant reflective core of reflectivity from 40% to 80%; having deposited thereupon at least one dielectric coating layer formed of at least one metal oxide, the metal oxide layer having been formed by deposition on the core by hydrolysis of a hydrolyzable metal salt in an strongly acidic aqueous medium, and thereafter full transformation into the oxide by calcination.
    Type: Application
    Filed: March 21, 2002
    Publication date: September 26, 2002
    Inventors: Jack Polonka, Patrice Bujard, Natacha Bonnard Pillonel, Fritz Herren
  • Color effect pigments and method of forming the same
    Patent number: 6369147
    Abstract: A metallic effect pigment including a metallic, corrosion resistant reflective core of reflectivity from 40% to 80%; having deposited thereupon at least one dielectric coating layer formed of at least one metal oxide, the metal oxide layer having been formed by deposition on the core by hydrolysis of a hydrolyzable metal salt in an strongly acidic aqueous medium, and thereafter full transformation into the oxide by calcination.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: April 9, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jack Polonka, Patrice Bujard, Natacha Bonnard Pillonel, Fritz Herren