Patents by Inventor Masaru Sadachika

Masaru Sadachika 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).

  • Method for vacuum/reduced-pressure refining and facility for vacuum/reduced-pressure refining
    Patent number: 6251169
    Abstract: A vacuum/reduced pressure refining vessel (1) is connected, by an upstream duct (5) to a dry dust collector (3) that uses a filter (2). The dry dust collector (3) is connected to a reduced pressure evacuating apparatus (4) by a downstream duct (6), and a block valve (7) is provided in the upstream duct (5). At the start of a vacuum/reduced pressure refining treatment, a non-oxidizing gas is injected into the upstream duct at a position that is upstream of the block valve (7) to substantially replace the oxygen in the upstream duct and to hermetically close the upstream duct. After the hermetically closed state has been established in the upstream duct, the block valve (7) is opened and operation of the dry dust collector (3) is started.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: June 26, 2001
    Assignee: Nippon Steel Corporation
    Inventors: Kensuke Shimomura, Masaru Sadachika, Hironori Takano, Gaku Ogawa, Kenji Abe, Mayumi Okimori, Nobuyuki Makino, Hiroshi Iwasaki, Tomoaki Tanaka, Hiroaki Morishige