Patents by Inventor Hisayo Oyama

Hisayo Oyama 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).

  • Publication number: 20100331177
    Abstract: The present invention provides amorphous silica particles having high oil absorbency and high structural characteristics, wherein the oil absorbency is hardly decreased even when a high load is applied to the amorphous silica particles. In particular, amorphous silica particles are provided, wherein the maximum value of ?Vp/?Rp (where Vp is the pore volume [mm3g] and Rp is the pore radius [nm]) is 20 mm3/nm·g?1 or more in the pore distribution curve obtained by a benzene adsorption isotherm, and the pore peak radius when the ?Vp/?Rp value is maximum is from 20 nm or more to 100 nm or less.
    Type: Application
    Filed: March 22, 2010
    Publication date: December 30, 2010
    Applicant: DSL JAPAN CO. LTD.
    Inventors: Shugo NISHI, Tatsuya Tokunaga, Hisayo Oyama
  • Publication number: 20080153694
    Abstract: The present invention provides amorphous silica particles having high oil absorbency and high structural characteristics, wherein the oil absorbency is hardly decreased even when a high load is applied to the amorphous silica particles. In particular, amorphous silica particles are provided, wherein the maximum value of ?Vp/?Rp (where Vp is the pore volume [mm3/g] and Rp is the pore radius [nm]) is 20 mm3/nm·g?1 or more in the pore distribution curve obtained by a benzene adsorption isotherm, and the pore peak radius when the ?Vp/?Rp value is maximum is from 20 nm or more to 100 nm or less.
    Type: Application
    Filed: July 29, 2004
    Publication date: June 26, 2008
    Applicant: SONY CORPORATION
    Inventors: Shugo Nishi, Tatsuya Tokunaga, Hisayo Oyama