Patents by Inventor Jessica M. Williamson

Jessica M. Williamson 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).

  • Composite crystal colloidal array with photochromic member
    Patent number: 8641933
    Abstract: The invention includes a composite material for use in a security device including a radiation diffracting component that exhibits a first optical effect and a photochromic component that exhibits a second optical effect. The composite material is particularly suited for use in authenticating articles, such as currency.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: February 4, 2014
    Assignee: PPG Industries Ohio, Inc
    Inventors: Sean Purdy, Jessica M. Williamson, Anil Kumar, Noel R. Vanier, Wei Wang, Shan Cheng, Xiangling Xu
  • Method of imaging in crystalline colloidal arrays
    Patent number: 8490546
    Abstract: A method of printing an image that diffracts radiation is disclosed. The method includes assembling an ordered periodic array of particles on a substrate, wherein the array of particles diffracts radiation in a wavelength band dependent on viewing angle; printing an imaging composition onto a portion of the array in a configuration of an image; shifting the wavelength band of radiation diffracted and changing the refractive index by the printed portion of the array so that the printed portion diffracts radiation at a different wavelength band and reflectivity intensity from a remaining portion of the array; and fixing the printed portion of the array, such that the printed portion of the array diffracts radiation and exhibits the image.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: July 23, 2013
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Sean Purdy, Jessica M. Williamson
  • COMPOSITE CRYSTAL COLLOIDAL ARRAY WITH PHOTOCHROMIC MEMBER
    Publication number: 20130075676
    Abstract: The invention includes a composite material for use in a security device including a radiation diffracting component that exhibits a first optical effect and a photochromic component that exhibits a second optical effect. The composite material is particularly suited for use in authenticating articles, such as currency.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 28, 2013
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Sean Purdy, Jessica M. Williamson, Anil Kumar, Noel R. Vanier, Wei Wang, Shan Cheng, Xiangling Xu
  • METHOD OF IMAGING IN CRYSTALLINE COLLOIDAL ARRAYS
    Publication number: 20120103211
    Abstract: A method of printing an image that diffracts radiation is disclosed. The method includes assembling an ordered periodic array of particles on a substrate, wherein the array of particles diffracts radiation in a wavelength band dependent on viewing angle; printing an imaging composition onto a portion of the array in a configuration of an image; shifting the wavelength band of radiation diffracted and changing the refractive index by the printed portion of the array so that the printed portion diffracts radiation at a different wavelength band and reflectivity intensity from a remaining portion of the array; and fixing the printed portion of the array, such that the printed portion of the array diffracts radiation and exhibits the image.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 3, 2012
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Sean Purdy, Jessica M. Williamson