Patents by Inventor Peter H. Shepard

Peter H. Shepard 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).

  • Patent number: 6712894
    Abstract: The present invention describes a method of producing an image which is visually distinct from its reproductions. This method comprises the steps of formulating an ink composition comprising a liquid vehicle and at least one modified pigment having attached at least one organic group and applying this ink composition to a substrate. Methods of determining the authenticity of an image and of verifying the date of creation of an image is also described.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: March 30, 2004
    Assignee: Cabot Corporation
    Inventor: Peter H. Shepard
  • Publication number: 20020185033
    Abstract: The present invention describes a method of producing an image which is visually distinct from its reproductions. This method comprises the steps of formulating an ink composition comprising a liquid vehicle and at least one modified pigment having attached at least one organic group and applying this ink composition to a substrate. Methods of determining the authenticity of an image and of verifying the date of creation of an image is also described.
    Type: Application
    Filed: May 9, 2001
    Publication date: December 12, 2002
    Inventor: Peter H. Shepard