Patents by Inventor Zifa Duan

Zifa Duan 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).

  • Alkali-Free Glass for Flat Panel Display and Melting Process Thereof
    Publication number: 20130217561
    Abstract: An alkali-free glass for flat panel display consists of, by weight, 54-68% SiO2, 10.8-17.1% Al2O3, 7.6-12.5% B2O3, 0.2-1.8% MgO, 4.2-8% CaO, 0.6-7.1% SrO, 0.1-5% BaO, 0.2-1% ZnO, 0.01-1.54% ZrO2 and 0.1-1.3% SnO+SnO2. The boroaluminosilicate glass of the present invention does not contain As and Sb which contribute to serious environmental pollution. The quality of the glass is improved by the specific process which reduces the content of the gas inclusions in the glass.
    Type: Application
    Filed: November 9, 2010
    Publication date: August 22, 2013
    Inventors: Guohong Yang, Zifa Duan, Dacheng Wang