Patents by Inventor Cindy Duong

Cindy Duong 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).

  • Highlighting marking compositions, highlighting kits, and highlighted complexes
    Patent number: 7488380
    Abstract: A highlighting (or marking) composition, such as an ink, including a non-eradicable colorant, an eradicable colorant; a kit including a first marking instrument comprising the highlighting mixture and a second marking instrument comprising an eradicator fluid; a colorant complex including a colorless or substantially colorless eradicable dye, a non-eradicable dye, and an eradicator; and methods of applying an eradicator to at least a portion of a marking made with a highlighting composition, are described herein.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: February 10, 2009
    Assignee: Sanford, L.P.
    Inventors: Wing Sum Vincent Kwan, Cindy Duong
  • Highlighting marking compositions, highlighting kits, and highlighted complexes
    Publication number: 20070017413
    Abstract: A highlighting (or marking) composition, such as an ink, including a non-eradicable colorant, an eradicable colorant; a kit including a first marking instrument comprising the highlighting mixture and a second marking instrument comprising an eradicator fluid; a colorant complex including a colorless or substantially colorless eradicable dye, a non-eradicable dye, and an eradicator; and methods of applying an eradicator to at least a portion of a marking made with a highlighting composition, are described herein.
    Type: Application
    Filed: May 11, 2006
    Publication date: January 25, 2007
    Inventors: Wing Sum Kwan, Cindy Duong