Patents by Inventor Masatoshi Maruki

Masatoshi Maruki 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).

  • Cerium oxide-zirconium oxide-based mixed oxide and method for producing thereof
    Patent number: 8048389
    Abstract: The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO2:ZrO2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: November 1, 2011
    Assignee: Daiichi Kigenso Kagaku Kogyo Co., Ltd.
    Inventors: Hiroshi Okamoto, Masatoshi Maruki
  • CERIUM OXIDE-ZIRCONIUM OXIDE-BASED MIXED OXIDE AND METHOD FOR PRODUCING THEREOF
    Publication number: 20110071017
    Abstract: The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO2:ZrO2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.
    Type: Application
    Filed: September 21, 2010
    Publication date: March 24, 2011
    Applicant: DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.
    Inventors: Hiroshi Okamoto, Masatoshi Maruki
  • Cerium-zirconium based compound oxide and production method thereof
    Patent number: 7795171
    Abstract: The present invention provides a cerium-zirconium based compound oxide having a total pore volume of at least 0.4 ml/g, the volume of pores having a diameter of 10 nm to 100 nm of 0.25 ml/g or more, and the volume of pores having a diameter of 100 nm to 10 ?m of 0.2 ml/g or less. The cerium-zirconium based compound oxide preferably has excellent thermal stability, which allows the desirable pore volume to be maintained even after conducting a further heat treatment at 1,000° C. for 3 hours.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: September 14, 2010
    Assignee: Daiichi Kigenso Kagaku Kogyo Co., Ltd.
    Inventors: Masatoshi Maruki, Hiroshi Okamoto, Hiroshi Kodama, Akiko Izumi
  • CERIUM-ZIRCONIUM BASED COMPOUND OXIDE AND PRODUCTION METHOD THEREOF
    Publication number: 20090258781
    Abstract: The present invention provides a cerium-zirconium based compound oxide having a total pore volume of at least 0.4 ml/g, the volume of pores having a diameter of 10 nm to 100 nm of 0.25 ml/g or more, and the volume of pores having a diameter of 100 nm to 10 ?m of 0.2 ml/g or less. The cerium-zirconium based compound oxide preferably has excellent thermal stability, which allows the desirable pore volume to be maintained even after conducting a further heat treatment at 1,000° C. for 3 hours.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 15, 2009
    Inventors: Masatoshi MARUKI, Hiroshi OKAMOTO, Hiroshi KODAMA, Akiko IZUMI
  • Cerium oxide-zirconium oxide-based mixed oxide and method for producing the same
    Publication number: 20080009410
    Abstract: The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO2: ZrO2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 10, 2008
    Inventors: Hiroshi Okamoto, Masatoshi Maruki