Patents by Inventor Takao Kasai

Takao Kasai 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).

  • Patent number: 6580014
    Abstract: An article (1) for thickening body fluids or excreta which contains a polysaccharide (10) capable of thickening in the presence of a polyvalent metal ion, the polysaccharide (10) being present in a state ready to dissolve or be dissociated in the moisture contained in body fluids or excreta.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: June 17, 2003
    Assignee: Kao Corporation
    Inventors: Takao Kasai, Hiroki Minowa, Taketo Ito
  • Publication number: 20020022812
    Abstract: An absorbent article comprising a liquid retentive absorbent layer containing a superabsorbent polymer and a liquid-impermeable leak proof layer is disclosed. An agent having a skin care effect and substantially no decomposing action on the superabsorbent polymer is fixed on a prescribed region of the absorbent article in a state ready to be released from that region upon contact with moisture.
    Type: Application
    Filed: May 11, 2001
    Publication date: February 21, 2002
    Inventors: Takao Kasai, Megumi Kondo, Noriko Sato, Manabu Matsui
  • Patent number: 6299664
    Abstract: A method of manufacturing a sliding part includes: an injection molding step of injection-molding a compacted member of a molding compound which is a mixture of powder material equivalent to SUS440C, graphite carbon corresponding to an oxygen content of the material, and a binder; a degreasing step of heating the compacted member thus obtained by the injection molding step under a neutral atmospheric condition to remove substantially all of the binder from the compacted member; and a baking step of heating the compacted member which is degreased under a vacuum condition of 0.1333 Pa or less from a room temperature up to 1000° C. to reduce an oxygen content of the compacted member to 0.02% or less by the reaction of C+O→CO, and then heating the compacted member under an argon atmospheric condition of 133.3 to 3999 Pa for two hours after the temperature is increased up to 1250° C.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: October 9, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Osamu Matsumoto, Masayuki Aota, Mamoru Sumida, Tsuyoshi Munezane, Takao Kasai, Takuro Kohyama
  • Patent number: 5746960
    Abstract: This manufacturing method of a powder injection molded part includes the steps of using a binder composition containing at least 2 kinds of thermoplastic binder components having an evaporation temperature higher than the injection molding temperature and a different evaporation initiating temperature from each other, elevating the temperature of a molded body above the evaporation initiating temperature of the binder component having the lowest evaporation initiating temperature rapidly, removing the binder component having the lowest evaporation initiating temperature from the molded body by holding this temperature, and thereafter, removing all binder components by elevating up to a temperature not lower than the evaporation initiating temperature of the binder component having the highest evaporation initiating temperature. By this method, the form unstability of final parts, which is a problem of the prior art, is resolved, dimensional accuracy is satisfied, and it is possible to shorten debinding times.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: May 5, 1998
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Takao Kasai, Kenichi Yoshikawa, Shigeru Saito, Masami Hoshi
  • Patent number: 5689796
    Abstract: The method of the invention is concerned with the manufacture of a molded copper-chromium family metal based alloy article which involves the steps of injection-molding a mixture of copper powder, a chromium family metal powder, an iron family metal powder and a thermoplastic organic binder made up of a polymer binder and low molecular binder in a ratio by volume of 5:1 to 1:1, dewaxing a molded body formed by the injection-molding by heating in a reducing atmosphere, and then sintering the dewaxed molded body at 1,100.degree. to 1,450.degree. C. in a reducing atmosphere. According to this method, molded articles having a high dimensional accuracy and high density can be provided.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: November 18, 1997
    Assignees: Citizen Watch Co., Ltd., Toho Kinzoku Co., Ltd.
    Inventors: Takao Kasai, Naoto Ogasawara, Naoyoshi Akiyoshi, Takeo Hamada
  • Patent number: 5283031
    Abstract: A process for producing a precision metal part of a sintered body by powder molding comprises using a metal powder of which the oxygen content and the hydrogen reduction loss are controlled to 0.5-6 wt. % and 1-7 wt. %, respectively. The sintered body has a high density near the theoretical density and is excellent in dimensional accuracy. The molding is facilitated, and the process is simple.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: February 1, 1994
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Naoto Ogasawara, Kenji Kurimura, Ken-ichi Yoshioka, Shigeru Saito, Takao Kasai, Masami Hoshi, Seiichi Nakamura
  • Patent number: 5151837
    Abstract: A magnetic head includes a core chip, a slider having an aperture for receiving the core chip and protrusions for positioning and constraining the core chip received in the aperture. The protrusions are formed on the inner walls of the aperture. After the core chip has been inserted into the aperture, a molten welding material is flowed into the clearance between the core chip and the inner walls of the aperture so as to weld the core chip to the inner walls of the aperture in the slider. The clearance between the core chip and the inner walls of the aperture is equalized. If the core chip is formed of soft magnetic material, the slider can absorb electromagnetic noises.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: September 29, 1992
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Makoto Wakasugi, Takao Kasai
  • Patent number: 4496248
    Abstract: A structure of a watch case, which comprises a watchglass, a case band member composed of a cemented carbide alloy and having a flange formed at an upper portion thereof and an annular surface formed at a lower portion of the flange, a watchglass supporting ring brazed to the case band member and having an upper surface for supporting a bottom surface of the watchglass, a packing for providing a waterproof and a back cover secured to the case band member. The packing is provided between the outer periphery of the watchglass and an annular groove. The annular groove is formed by the flange and annular surface of the case band member and the upper surface of the watchglass supporting ring.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: January 29, 1985
    Assignee: Citizen Watch Company Limited
    Inventors: Masahiko Waki, Seiji Umezawa, Tsuneji Takasugi, Hiroshi Koide, Takao Kasai
  • Patent number: 4444719
    Abstract: This gold solder comprises an Au-Cu-Ag-Ge alloy with 3 to 6% germanium and has a melting temperature of 800.degree. C. or below. The gold content of the gold solder is 50 to 70% equivalent to 12 to 16 Karat. The gold solder that exhibits corrosion resistance corresponding to that of materials such as a gold alloy, stainless steel, stellite and sintered carbide makes it possible to solder at 800.degree. C. or below ornamental parts made of the above materials. As a result, any surface degradation is prevented during the soldering process of mirror-polished ornamental parts.
    Type: Grant
    Filed: February 16, 1983
    Date of Patent: April 24, 1984
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yosuke Sakakibara, Takao Kasai, Tsuneji Takasugi