Patents by Inventor Shu Chung Li

Shu Chung Li 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).

  • Anodizing Aluminum and Alloys Thereof
    Publication number: 20080274375
    Abstract: This invention encompasses methods of producing a colored oxide layer on an aluminum material by anodizing the aluminum material in an electrolyte comprising water, sulfuric acid and oxalic acid. The anodizing step comprises passing at least two sequential current densities through the electrolyte. Methods of making and using article with a colored oxide layer on an aluminum material make by the methods disclosed herein are also disclosed.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 6, 2008
    Applicant: DURACOUCHE INTERNATIONAL LIMITED
    Inventors: Fuk Chiu Ng, Shu Chung Li