Patents by Inventor David Augustus Chang

David Augustus Chang 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).

  • Dispenser for a tablet, and methods of use
    Patent number: 7462289
    Abstract: The present invention relates to improved dispensers for a tablet containing or consisting of a dissolvable composition which, when contacted with water, will elute one or more chemical compounds to the water. More particularly the present invention relates to such an improved dispenser for a tablet which according to one aspect of the invention is particularly useful with, or forms a part of a device for the treatment of water, particularly a device useful in the purification of water.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: December 9, 2008
    Assignee: Reckitt Benckiser Inc.
    Inventors: Francesc Ayats, David Augustus Chang, Jay Packman