Patents by Inventor Nalin Rupasinghe

Nalin Rupasinghe 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).

  • Electron emission film and field emission cold cathode device
    Patent number: 6469425
    Abstract: An electron emission film includes a matrix consisting essentially of amorphous carbon and fullerene-like structures consisting essentially of a two-dimensional network of six-membered carbon rings. The fullerene-like structures are dispersed in the matrix and partially project from the matrix. The weight ratio of amorphous carbon to the fullerene-like structures is about 50:50 to 5:95. Amorphous carbon contains nitrogen acting as a donor at a concentration of about 4×10−7 to 10 atom %.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: October 22, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Sakai, Kazuya Nakayama, Li Zhang, Gehan Anil Joseph Amaratunga, Ioannis Alexandrou, Mark Baxendale, Nalin Rupasinghe