Patents by Inventor Hiroshi Masujima

Hiroshi Masujima 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).

  • Composition containing calcium carbonate particles dispersed in sulfur for removing nitrate nitrogen
    Patent number: 7109022
    Abstract: This invention relates to a denitrifying composition which is a material to be used for decomposing nitrates nitrogen in effluent by sulfur-oxidizing bacteria that consume sulfur and carbonate as nutrients and is characterized by containing particles of calcium carbonate dispersed in sulfur. Preferably, the composition contains 10 parts by weight of sulfur coexisting with 10-15 parts by weight of calcium carbonate and 1-3 parts by weight of a microporous substance. This denitrifying composition can be prepared by heating powder of calcium carbonate and sulfur thereby melting the sulfur, dispersing the powder of calcium carbonate in liquid sulfur and solidifying the dispersion by rapid cooling. The composition simultaneously contains nutrients and alkali source and hence enables denitrification to proceed stably without addition of other components.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: September 19, 2006
    Assignees: Nitchitsu Co., Ltd, Nippon Steel Chemical Co., Ltd.
    Inventors: Atsushi Yatagai, Tomomichi Gunji, Hiroshi Masujima, Takuma Yabe, Toru Oishi
  • Composition containing calcium carbonate particles dispersed in sulfur for removing nitrate nitrogen
    Patent number: 6734011
    Abstract: This invention relates to a denitrifying composition which is a material to be used for decomposing nitrates nitrogen in effluent by sulfur-oxidizing bacteria that consume sulfur and carbonate as nutrients and is characterized by containing particles of calcium carbonate dispersed in sulfur. Preferably, the composition contains 10 parts by weight of sulfur coexisting with 10-15 parts by weight of calcium carbonate and 1-3 parts by weight of a microporous substance. This denitrifying composition can be prepared by heating powder of calcium carbonate and sulfur thereby melting the sulfur, dispersing the powder of calcium carbonate in liquid sulfur and solidifying the dispersion by rapid cooling. The composition simultaneously contains nutrients and alkali source and hence enables denitrification to proceed stably without addition of other components.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: May 11, 2004
    Assignees: Nitchitsu Co., Ltd, Nippon Steel Chemical Co., Ltd.
    Inventors: Atsushi Yatagai, Tomomichi Gunji, Hiroshi Masujima, Takuma Yabe, Toru Oishi