Patents by Inventor Yiu-Wing Mai

Yiu-Wing Mai 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).

  • Multi-layered superhard nanocomposite coatings
    Patent number: 7097922
    Abstract: Superhard nanocomposite coatings which are applicable to coating contact surfaces on substrates in a variety of industrial processes are disclosed. In a typical embodiment, the superhard nanocomposite coating includes a refractory metal silicon nitride coating layer having silicon in a concentration of from about 6 atomic percent to about 12 atomic percent.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: August 29, 2006
    Assignees: General Motors Corporation, City University of Hong Kong
    Inventors: Yaogen Shen, Yiu-Wing Mai, Lawrence Kwok-Yan Li, Tai Lun Chan, Simon Chin-Yu Tung
  • MULTI-LAYERED SUPERHARD NANOCOMPOSITE COATINGS
    Publication number: 20060147728
    Abstract: Superhard nanocomposite coatings which are applicable to coating contact surfaces on substrates in a variety of industrial processes are disclosed. In a typical embodiment, the superhard nanocomposite coating includes a refractory metal silicon nitride coating layer having silicon in a concentration of from about 6 atomic percent to about 12 atomic percent.
    Type: Application
    Filed: May 3, 2004
    Publication date: July 6, 2006
    Inventors: Yaogen Shen, Yiu-Wing Mai, Lawrence Li, Tai Chan, Simon Tung
  • Method of manufacturing flexible graphite
    Patent number: 5503717
    Abstract: A ZnCl.sub.2 -graphite intercalation compound is synthesised by an electrochemical process in an aqueous solution. Flexible graphite is manufactured by exfoliating and then compressing the ZnCl.sub.2 -graphite intercalation compound into a sheet form. This processing is suitable for mass production. As no sulphuric acid is used in this method, the method reduces environmental pollution and corrosion during use.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: April 2, 1996
    Inventors: Feiyu Kang, Yang Leng, Tong-Yi Zhang, Yiu-Wing Mai