Patents by Inventor Ashfaqul Islam Chowdhury

Ashfaqul Islam Chowdhury 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).

  • High temperature seal for electric lamp
    Patent number: 7759871
    Abstract: An improved seal for an electric lamp is provided. An oxidation-resistant coating is provided on the current conductor where the outer lead joins the seal foil, preferably at the pinch seal. The coating is preferably a chromium layer covered by a chromium layer or a silver layer covered by a layer of hydrogenated silicon oxy carbon polymer. The coating is preferably applied via sputtering where the coating is subject to high energy electron or ion bombardment during sputtering. Preferably the coating is applied via sputtering at increased deposition pressure.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 20, 2010
    Assignee: General Electric Company
    Inventors: Ashfaqul Islam Chowdhury, Roger Hume, Barry Preston, Rajasingh Israel, Tianji Zhao