Patents by Inventor Chang-lee Yang

Chang-lee Yang 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).

  • Publication number: 20240121902
    Abstract: The present invention relates to a surface-treated copper foil, which has excellent adhesive strength with a resin substrate, shows low bending deformation after adhesion with a resin substrate, and is suitable as a high-frequency foil due to its low transmission loss, to a copper clad laminate comprising same, and to a printed wiring board.
    Type: Application
    Filed: January 11, 2022
    Publication date: April 11, 2024
    Inventors: Chang Yol YANG, Jung Woo SEO, Kideok SONG, Sunhyoung LEE
  • Patent number: 4583994
    Abstract: Carbon monoxide-containing gas streams are converted to methane by a cyclic, essentially two-step process in which said carbon monoxide is disproportionated to form carbon dioxide and active surface carbon deposited on the surface of a catalyst, and said carbon is reacted with steam to form product methane and by-product carbon dioxide. The exothermic heat of reaction generated in each step is effectively removed during each complete cycle so as to avoid a build up of heat from cycle-to-cycle, with particularly advantageous techniques being employed for fixed bed, tubular and fluidized bed reactor operations.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: April 22, 1986
    Assignee: Union Carbide Corporation
    Inventors: Albert C. Frost, Chang-Lee Yang
  • Patent number: 4351646
    Abstract: Carbon monoxide-containing gas streams are converted to methane by a cyclic, essentially two-step process in which said carbon monoxide is disproportionated to form carbon dioxide and active surface carbon deposited on the surface of a catalyst, and said carbon is reacted with steam to form product methane and by-product carbon dioxide. The exothermic heat of reaction generated in each step is effectively removed during each complete cycle so as to avoid a build up of heat from cycle-to-cycle, with particularly advantageous techniques being employed for fixed bed, tubular and fluidized bed reactor operations.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: September 28, 1982
    Assignee: Union Carbide Corporation
    Inventors: Albert C. Frost, Chang-lee Yang