Patents by Inventor Rika Takigawa

Rika Takigawa 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).

  • Brazing fillers for sealing vacuum-tight vessels, vacuum-tight vessels and method for manufacturing vacuum-tight vessels
    Patent number: 5916520
    Abstract: The brazing filler of the present invention is excellent in wetting properties towards the open end of a ceramic cylinder and a metal sealing cap can be sealed well on the open end. The present brazing filler comprises Ag, Cu and active metal, in which the Cu-active metal compound is contained in an amount of not more than 40% by volume.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: June 29, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miho Maruyama, Masako Nakahashi, Kiyoshi Osabe, Rika Takigawa, Shoji Niwa