Patents by Inventor Kuen-Sen Chang

Kuen-Sen 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).

  • Method for removing heavy metals from incinerator fly ashes
    Patent number: 7635796
    Abstract: A method of removing heavy metals from incinerator fly ashes has the steps of: Determining the type of waste and its treating mode of an incinerator, and determining the outlet(s) and quantities of original fly ash (OFA) and reacted fly ash (RAF) in the incineration facility; Sampling OFA and RFA from their generation positions and detecting properties of OFA and RFA respectively; Calculating heavy metal(s) which exceeds the TCLP standard; Determining an optimal mixing ratio of OFA and RFA for two independent outlets, or the quantity of OFA or RFA that should be added with the convergence of OFA and RFA for one outlet; Extracting heavy metals from the mixed fly ash by a liquid to remove the heavy metals.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: December 22, 2009
    Inventor: Kuen-Sen Chang
  • Method for removing heavy metals from incinerator fly ashes
    Publication number: 20050137444
    Abstract: A method of removing heavy metals from incinerator fly ashes has the steps of: Determining the type of waste and its treating mode of an incinerator, and determining the outlet(s) and quantities of original fly ash (OFA) and reacted fly ash (RAF) in the incineration facility; Sampling OFA and RFA from their generation positions and detecting properties of OFA and RFA respectively; Calculating heavy metal(s) which exceeds the TCLP standard; Determining an optimal mixing ratio of OFA and RFA for two independent outlets, or the quantity of OFA or RFA that should be added with the convergence of OFA and RFA for one outlet; Extracting heavy metals from the mixed fly ash by a liquid to remove the heavy metals.
    Type: Application
    Filed: December 20, 2004
    Publication date: June 23, 2005
    Inventor: Kuen-Sen Chang