Patents by Inventor Hiroo Yoshitome

Hiroo Yoshitome 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).

  • Sol having fine particles dispersed and method for preparing
    Patent number: 6680040
    Abstract: The porous composite oxide particle is coated with a porous silica-based inorganic oxide layer, and also a substrate has a coating film with the fine particles thereon, which has a low refractive index and excellent in adhesion with a resin or the like, strength, the ability to reduce reflection and the like. The fine particles include porous composite oxide with silica and an inorganic oxide other than silica, wherein the fine particles are coated with a porous silica-based inorganic oxide layer having a thickness from 0.5 to 20 nm. The fine particles include preferably an organic group directly bonded to silicon, and SR/ST, the ratio of the molar amount of silicon having the organic group directly bonded thereto (SR) vs the molar amount of the total silicon (ST), is preferably in the range from 0.001 to 0.9.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: January 20, 2004
    Assignee: Catalysts & Chemicals Industries Co., Ltd.
    Inventors: Hiroyasu Nishida, Mitsuru Nakai, Michio Komatsu, Hiroo Yoshitome