Patents by Inventor William W. Tao

William W. Tao 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).

  • Weak acid based concrete stain
    Patent number: 8460399
    Abstract: The present invention provides compositions and methods which are adapted to impart color to concrete or mineral substrate surfaces. Specifically, the present invention relates to a composition and methods adapted to treat concrete surfaces which have the advantage of using a non-corrosive acid-based solution.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: June 11, 2013
    Assignee: Valspar Corporation
    Inventors: Sanford Lee Hertz, Ed Daraskevich, William W. Tao, Jason J. Netherton, Matthew S. Gebhard
  • Weak Acid Based Concrete Stain
    Publication number: 20080276387
    Abstract: The present invention provides compositions and methods which are adapted to impart color to concrete or mineral substrate surfaces. Specifically, the present invention relates to a composition and methods adapted to treat concrete surfaces which have the advantage of using a non-corrosive acid-based solution.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 13, 2008
    Inventors: Sanford Lee Hertz, Ed Daraskevich, William W. Tao, Jason J. Netherton, Matthew S. Gebhard