Patents by Inventor Yujin Shoda

Yujin Shoda 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 production of nuclear halogenated aromatic compound possessing cyano groups
    Patent number: 6034264
    Abstract: A nuclear halogenated aromatic compound possessing cyano groups is produced by a method using as a raw material an aromatic compound which possesses cyano groups and assumes a solid state at room temperature and subjecting the raw material to a procedure comprising a step of melting and transporting the compound by a means transport-melting, a step of vaporizing the compound, a step of mixing the compound with a halogen gas, and a step of causing the vapor of the compound to react with the halogen gas in vapor phase in the presence of a catalyst sequentially in the order mentioned, which comprises maintaining a content of a self-condensate of the aromatic compound possessing cyano groups which arise during the melting of the aromatic compound possessing cyano groups in a gas of the compound which reacts with the halogen gas to a level of not more than 2.5 mol % based on the compound.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: March 7, 2000
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Osamu Kaieda, Koichi Hirota, Teruhisa Kajiwara, Norimasa Okuda, Hisakazu Shindo, Yoshiro Hanayama, Yujin Shoda, Toyohiko Kohno, deceased, Takashi Yodoshi, Masaru Awashima
  • Method for production of nuclear halogenated aromatic compound possesing cyano groups
    Patent number: 5789582
    Abstract: A nuclear halogenated aromatic compound possessing cyano groups is produced by a method using as a raw material an aromatic compound which possesses cyano groups and assumes a solid state at room temperature and subjecting the raw material to a procedure comprising a step of melting and transporting the compound by a means transport-melting, a step of vaporizing the compound, a step of mixing the compound with a halogen gas, and a step of causing the vapor of the compound to react with the halogen gas in vapor phase in the presence of a catalyst sequentially in the order mentioned, which comprises maintaining a content of a self-condensate of the aromatic compound possessing cyano groups which arise during the melting of the aromatic compound possessing cyano groups in a gas of the compound which reacts with the halogen gas to a level of not more than 2.5 mol % based on the compound.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: August 4, 1998
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Osamu Kaieda, Koichi Hirota, Teruhisa Kajiwara, Norimasa Okuda, Hisakazu Shindo, Yoshiro Hanayama, Yujin Shoda, Toyohiko Kohno, deceased, Takashi Yodoshi, Masaru Awashima