Patents by Inventor Yuji Shigeno

Yuji Shigeno 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).

  • Process for production of titanium dioxide pigment and resin composition containing the pigment
    Patent number: 7144838
    Abstract: The present invention relates to a process for producing titanium dioxide pigment, which comprises a step of coating hydrolysis product of an alkylsilane compound represented by the following formula (1): (where R is an alkyl group having 5 or less carbon atoms, R? is a hydrolyzable group, and n is an integer of 1 to 3, m is an integer of 0 to 2, and n+m?3) by dry processing on surfaces of particles of titanium dioxide pigment. The present invention provides titanium dioxide pigment with distinguished hydrophobic property, dispersibility, and heat resistance.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: December 5, 2006
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hideo Takahashi, Toshihiko Akamatsu, Yuji Shigeno
  • Process for production of titanium dioxide pigment and resin composition containing the pigment
    Publication number: 20050129602
    Abstract: The present invention relates to a process for producing titanium dioxide pigment, which comprises a step of coating hydrolysis product of an alkylsilane compound represented by the following formula (1): (where R is an alkyl group having 5 or less carbon atoms, R? is a hydrolyzable group, and n is an integer of 1 to 3, m is an integer of 0 to 2, and n+m?3) by dry processing on surfaces of particles of titanium dioxide pigment. The present invention provides titanium dioxide pigment with distinguished hydrophobic property, dispersibility, and heat resistance.
    Type: Application
    Filed: March 10, 2003
    Publication date: June 16, 2005
    Applicant: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Hideo Takahashi, Toshihiko Akamatsu, Yuji Shigeno