Patents by Inventor Hatsumi Ikari

Hatsumi Ikari 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).

  • Anti-fog coating material and method of preparing an anti-fog article
    Patent number: 6506446
    Abstract: An anti-fog article is obtained by coating a substrate with an anti-fog coating material to form thereon an anti-fog coating film that is hydrophillic, moisture-absorptive, insoluble and excellent in surface hardness. The anti-fog coating material contains a polyacrylic acid compound, polyvinyl alcohol and acetylacetone, and optionally sodium silicate.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 14, 2003
    Assignees: Canon Kabushiki Kaisha, Nakato Laboratory, Inc.
    Inventors: Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari, Keiji Ikemori, Keiji Ohtaka, Hideo Ukuda
  • Anti-fog coating material and anti-fog article
    Publication number: 20020061950
    Abstract: An anti-fog article is obtained by coating a substrate with an anti-fog coating material to form thereon an anti-fog coating film that is hydrophillic, moisture-absorptive, insoluble and excellent in surface hardness. The anti-fog coating material contains a polyacrylic acid compound, polyvinyl alcohol and acetylacetone, and optionally sodium silicate.
    Type: Application
    Filed: December 10, 2001
    Publication date: May 23, 2002
    Inventors: Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari, Keiji Ikemori, Keiji Ohtaka, Hideo Ukuda
  • Anti-fogging coating material, anti-fogging coating film and anti-fogging article
    Patent number: 6306932
    Abstract: Disclosed herein is an anti-fogging coating material comprising at least one selected from the group consisting of an inorganic alkoxide, a hydrolysate of the inorganic alkoxide and a polycondensate of the hydrolysate of the inorganic alkoxide, a polyacrylic, and polyvinyl alcohol.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: October 23, 2001
    Assignees: Canon Kabushiki Kaisha, Nakato Laboratory, Inc.
    Inventors: Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari, Keiji Ikemori, Keiji Ohtaka, Hideo Ukuda
  • Non-fogging antireflection film and optical member, and production process thereof
    Patent number: 5976680
    Abstract: An antireflection film is provided which is insoluble, wear-resistant, and weatherable, and simultaneously having non-fogging property. A non-fogging optical member employing the non-fogging antireflection film, and a process for producing the film are also provided. The non-fogging antireflection film is formed from a composition derived by polycondensation of a hydrolyzate of an inorganic alkoxide conducted in the presence of a polyacrylic acid compound.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: November 2, 1999
    Assignees: Canon Kabushiki Kaisha, Nakato Laboratory, Inc.
    Inventors: Keiji Ikemori, Shoichi Shimura, Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari
  • Anti-fogging coating composition, anti-fogging coated article and method for producing same
    Patent number: 5854341
    Abstract: An anti-fogging coating composition contains (a) an inorganic alkoxide and/or a hydroxyl group-containing polymer formed therefrom by hydrolysis and polycondensation, the inorganic alkoxide being represented by the formula (I):M(OR).sub.n (X).sub.a-n (I),wherein M is an inorganic element selected from the group consisting of Si, Al, Ti, Zr, Ca, Fe, V, Sn, Li, Be, B and P; R is an alkyl group; X is an alkyl group with or without functional groups or a halogen atom; a is a number representing the valence of M; and n is an integer from 1 to a; (b) a polyalkylene oxide, a weight ratio of the polyalkylene oxide to the inorganic alkoxide and/or the hydroxyl group-containing polymer being 100/1-100/150; (c) 0.5 parts by weight or less of an acid catalyst per 100 parts by weight of (a); (d) 0.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: December 29, 1998
    Assignees: Nakato Laboratory, Inc., Canon Kabushiki Kaisha
    Inventors: Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari