Patents by Inventor Yu-Zhi Kiang

Yu-Zhi Kiang 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 reducing elemental sulfur in gypsum products
    Patent number: 9656876
    Abstract: Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: May 23, 2017
    Assignee: CertainTeed Gypsum, Inc.
    Inventors: John W. College, Sang-Ho Lee, Chris Hilton, Yu-Zhi Kiang, Choung-Houng Lai, George Glavin
  • Method For Reducing Elemental Sulfur In Gypsum Products
    Publication number: 20170121183
    Abstract: Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 4, 2017
    Inventors: John W. College, Sang-Ho Lee, Chris Hilton, Yu-Zhi Kiang, Choung-Houng Lai, George Glavin, Helen Ilyashenko