Patents by Inventor Shunzo Shimai

Shunzo Shimai 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: 20200055783
    Abstract: Provided is a production method that can easily produce a calcium carbonate porous sintered body. The production method includes the steps of: preparing a dispersion liquid containing calcium carbonate and a gelling agent; adding a foaming agent to the dispersion liquid, followed by stirring until foamy to make a foam; turning the foam into a gel; and sintering the gelled foam to produce a calcium carbonate porous sintered body.
    Type: Application
    Filed: February 26, 2018
    Publication date: February 20, 2020
    Applicant: SHIRAISHI CENTRAL LABORATORIES CO. LTD.
    Inventors: Masahiko Tajika, Shota Umemoto, Shunzo Shimai
  • Publication number: 20120223449
    Abstract: A kind or transparent alumina ceramics is disclosed herein, the optical axes of all or part or the crystal grains of the transparent alumina ceramics are arranged in a direction, which makes the transparent alumina ceramics have orientation.
    Type: Application
    Filed: May 14, 2012
    Publication date: September 6, 2012
    Applicant: Shanghai Institute of Ceramics, Chinese Academy of Sciences
    Inventors: Xiaojian MAO, Shiwei WANG, Shunzo SHIMAI
  • Publication number: 20110039685
    Abstract: A kind of transparent alumina ceramics is disclosed herein, the optical axes of all or part of the crystal grains of the transparent alumina ceramics are arranged in a direction, which makes the transparent alumina ceramics have orientation.
    Type: Application
    Filed: June 28, 2010
    Publication date: February 17, 2011
    Applicant: Shanghai Institute of Ceramics, Chinese Academy of Sciences
    Inventors: Xiaojian MAO, Shiwei WANG, Shunzo SHIMAI
  • Patent number: 7381362
    Abstract: To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: June 3, 2008
    Assignee: Covalent Materials Corporation
    Inventors: Hideo Uemoto, Kazuhide Kawai, Shunzo Shimai, Takashi Matsuyama
  • Patent number: 7175911
    Abstract: The invention provides titanium dioxide fine particles, wherein nitrogen and at least one element selected from carbon, hydrogen, sulfur doped in titanium dioxide by heat-treating fine particles of a material of titanium dioxide at 500° C. or more and 600° C. or less in a reducing gas atmosphere containing nitrogen. The titanium fine particles exhibit a high photocatalytic activity than in the conventional art by irradiating a visible light such that they exhibit an isopropanol oxidation activity induced by visible light irradiation with a wavelength of 400 nm or more and 600 nm or less with excellent stability and durability of the photocatalytic activity.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: February 13, 2007
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Zhonghua Zhou, Fumio Tokuoka, Yugo Ito, Tatsuya Ishii, Shunzo Shimai, Hiroshi Yamaguchi, Hiroyuki Kondo
  • Publication number: 20050200055
    Abstract: To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.
    Type: Application
    Filed: January 21, 2005
    Publication date: September 15, 2005
    Applicant: Toshiba Ceramics Co., Ltd.
    Inventors: Hideo Uemoto, Kazuhide Kawai, Shunzo Shimai, Takashi Matsuyama
  • Patent number: 6861122
    Abstract: The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: March 1, 2005
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Kazuhide Kawai, Shunzo Shimai, Makoto Takahashi, Hiroaki Shitara, Fumio Tokuoka, Masahiko Ichishima, Takashi Suzuki, Toyokazu Matsuyama, Hideo Uemoto
  • Publication number: 20040058149
    Abstract: The invention provides titanium dioxide fine particles, wherein nitrogen and at least one element selected from carbon, hydrogen, sulfur doped in titanium dioxide by heat-treating fine particles of a material of titanium dioxide at 500° C. or more and 600° C. or less in a reducing gas atmosphere containing nitrogen. The titanium fine particles exhibit a high photocatalytic activity than in the conventional art by irradiating a visible light such that they exhibit an isopropanol oxidation activity induced by visible light irradiation with a wavelength of 400 nm or more and 600 nm or less with excellent stability and durability of the photocatalytic activity.
    Type: Application
    Filed: September 17, 2003
    Publication date: March 25, 2004
    Applicant: TOSHIBA CERAMICS CO., LTD.
    Inventors: Zhonghua Zhou, Fumio Tokuoka, Yugo Ito, Tatsuya Ishii, Shunzo Shimai, Hiroshi Yamaguchi, Hiroyuki Kondo
  • Publication number: 20030052428
    Abstract: To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.
    Type: Application
    Filed: July 1, 2002
    Publication date: March 20, 2003
    Applicant: Toshiba Ceramics Co., Ltd.
    Inventors: Hideo Uemoto, Kazuhide Kawai, Shunzo Shimai, Takashi Matsuyama
  • Publication number: 20030019843
    Abstract: The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.
    Type: Application
    Filed: January 31, 2002
    Publication date: January 30, 2003
    Applicant: TOSHIBA CERAMICS CO., LTD.
    Inventors: Kazuhide Kawai, Shunzo Shimai, Makoto Takahashi, Hiroaki Shitara, Fumio Tokuoka, Masahiko Ichishima, Takashi Suzuki, Toyokazu Matsuyama, Hideo Uemoto
  • Patent number: 5834108
    Abstract: A ceramic porous body has a layered structure including a plurality of foam-like ceramic layers. The foam-like ceramic layers are formed by firing foam-like ceramic shaped layers each having a thickness of not more than 5 mm. The adjacent shaped layers are joined directly, or bonded via a thin foam-like ceramic layer or dense ceramic layer.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: November 10, 1998
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Shunzo Shimai, Koichi Imura, Ichiro Shibata, Kenichi Okamoto, Akiko Niizuma, Tadayoshi Muto
  • Patent number: 5762841
    Abstract: A ceramic porous body is constituted of ceramic particles which have a substantially continuous, monotonic size distribution in the thickness direction of the porous body.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: June 9, 1998
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Shunzo Shimai, Koichi Imura, Kenichi Okamoto, Koichi Shiraishi, Kuniko Ando
  • Patent number: 5405529
    Abstract: A cylindrical support member consists of a bone-like porous ceramic member and a ceramic porous network member having a three-dimensional network structure provided outside the bone-like member so as to constitute an integral part. A ceramic membrane having a smaller pore size and serving as a filter membrane is formed on the exposed surface of the bone-like member and the surfaces of the struts of the network member by a ceramic-slurry foaming technique.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: April 11, 1995
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Shunzo Shimai, Koichi Imura, Kenichi Okamoto, Tadayoshi Muto
  • Patent number: 5089134
    Abstract: A silica glass filter comprises a porous support body composed of amorphous silica particles as a porous sintered body and having a purity of 99.9% or more and containing 150 ppm or less in total of impurities including alkali, alkali metal, heavy metal and/or elements of III B group, and a filtration layer formed on the support body. The filtration layer is composed of amorphous silica particles as a porous sintered body in a fine mode and has substantially the same purity as that of the support body.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: February 18, 1992
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Kuniko Ando, Koichi Shiraishi, Masaru Shimbo, Shunzo Shimai
  • Patent number: 4862030
    Abstract: A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: August 29, 1989
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Katsunori Yokoyama, Yukio Sato, Shunzo Shimai
  • Patent number: 4824035
    Abstract: A cage mill includes a housing, a disc rotatably supported within the housing, a plurality of support shafts each fixed at one end to the disc so as to form a cage, a band fixed to the other end of each of the support shafts, a plurality of ceramic pins each having a through-hole in which one of the support shafts is placed so as to support one of the ceramic pins, and a plurality of nuts each engaging with a male screw portion of each end of the support shafts for releasably fixing the support shafts and the ceramic pins to the disc and the band. The support shafts and loosely placed in the ceramic pins, respectively, so that the latter can be turned around the former when the nuts are released.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: April 25, 1989
    Assignees: Toshiba Ceramics Co., Ltd., Kansai Zyari Kabushiki-Kaisha, Otsuka Iron Works, Ltd.
    Inventors: Sousuke Naito, Hidekazu Takahashi, Shunzo Shimai, Toshio Watanabe, Yasuji Otsuka
  • Patent number: 4799601
    Abstract: The disclosed process includes making a slip or slurry by mixing alumina powder, water, a deflocculant and a magnesium compound, casting the slip or slurry by drain casting and thereafter firing or sintering same. A coagulant is used as the deflocculant.A tube for a lamp, which is a unitary body of translucent alumina ceramic, has a large-diameter portion located at a central portion of the tube and two small-diameter portions located at both end portions of the tube. The tube is produced by drain casting. The tube has substantially the same wall thickness over its whole length. The inner surface of the tube is more smooth than its outer surface.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: January 24, 1989
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Shunzo Shimai, Yoshio Saito, Yawara Ando, Takashi Koseki
  • Patent number: 4769570
    Abstract: A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: September 6, 1988
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Katsunori Yokoyama, Yukio Sato, Shunzo Shimai