Patents by Inventor Keiko Nagai

Keiko Nagai 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: 8329150
    Abstract: Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast tosilate crystals. The method for evaluating evenness of suplatast tosilate crystals includes: (a) a step of adding a solvent to suplatast tosilate crystals to thereby dissolve 3% or less of the crystals in the solvent, and subjecting a portion of the supernatant of the resultant suspension to optical purity measurement, and (b) a step of adding a solvent to the remaining suspension to thereby dissolve the entirety of the suspension in the solvent, and subjecting a portion of the resultant solution to optical purity measurement, wherein the optical purity as measured in the step (a) is compared with the optical purity as measured in the step (b). The suplatast tosilate crystals exhibits excellent evenness and thermal stability. The method for producing the suplatast tosilate crystals is also provided.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: December 11, 2012
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Takanori Ushio, Keiko Nagai
  • Publication number: 20110213179
    Abstract: Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast tosilate crystals. The method for evaluating evenness of suplatast tosilate crystals includes: (a) a step of adding a solvent to suplatast tosilate crystals to thereby dissolve 30 or less of the crystals in the solvent, and subjecting a portion of the supernatant of the resultant suspension to optical purity measurement, and (b) a step of adding a solvent to the remaining suspension to thereby dissolve the entirety of the suspension in the solvent, and subjecting a portion of the resultant solution to optical purity measurement, wherein the optical purity as measured in the step (a) is compared with the optical purity as measured in the step (b). The suplatast tosilate crystals exhibits excellent evenness and thermal stability. The method for producing the suplatast tosilate crystals is also provided.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 1, 2011
    Applicant: TAIHO PHARMACEUTICAL CO., LTD.
    Inventors: Takanori Ushio, Keiko Nagai
  • Patent number: 7955607
    Abstract: Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast tosilate crystals. The method for evaluating evenness of suplatast tosilate crystals includes: (a) a step of adding a solvent to suplatast tosilate crystals to thereby dissolve 3% or less of the crystals in the solvent, and subjecting a portion of the supernatant of the resultant suspension to optical purity measurement, and (b) a step of adding a solvent to the remaining suspension to thereby dissolve the entirety of the suspension in the solvent, and subjecting a portion of the resultant solution to optical purity measurement, wherein the optical purity as measured in the step (a) is compared with the optical purity as measured in the step (b). The suplatast tosilate crystals exhibits excellent evenness and thermal stability. The method for producing the suplatast tosilate crystals is also provided.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: June 7, 2011
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Takanori Ushio, Keiko Nagai
  • Publication number: 20080070989
    Abstract: Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast tosilate crystals. The method for evaluating evenness of suplatast tosilate crystals includes: (a) a step of adding a solvent to suplatast tosilate crystals to thereby dissolve 3% or less of the crystals in the solvent, and subjecting a portion of the supernatant of the resultant suspension to optical purity measurement, and (b) a step of adding a solvent to the remaining suspension to thereby dissolve the entirety of the suspension in the solvent, and subjecting a portion of the resultant solution to optical purity measurement, wherein the optical purity as measured in the step (a) is compared with the optical purity as measured in the step (b). The suplatast tosilate crystals exhibits excellent evenness and thermal stability. The method for producing the suplatast tosilate crystals is also provided.
    Type: Application
    Filed: July 13, 2005
    Publication date: March 20, 2008
    Applicant: Taiho Pharmaceutical Co., Ltd.
    Inventors: Takanori Ushio, Keiko Nagai
  • Patent number: 7138140
    Abstract: Provided are a suplatast tosilate crystal showing characteristic peaks in powder X-ray diffraction diffraction angles (20±0.1°) of 5.6°, 9.0°, 11.0°, 15.3°, 16.5°, 17.2°, 17.9°, 19.2°, 19.9°, and 21.5°; and a preparation process of the crystal. Owing to merits such as fluctuation-free optically active substance ratio, low hygroscopicity and high storage stability, the suplatast tosilate crystal of the present invention can be mass-produced easily and, at the same time, is advantageous in drug preparation quality management. It is thus excellent as raw material for pharmaceuticals.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: November 21, 2006
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Takanori Ushio, Hidenori Miura, Keiko Nagai
  • Publication number: 20030149105
    Abstract: Provided are a suplatast tosilate crystal showing characteristic peaks in powder X-ray diffraction at diffraction angles (2&thgr;+0.1°) of 5.6°, 9.0°, 11.0°, 15.3°, 16.5°, 17.2°, 17.9°, 19.2°, 19.9° and 21.5°; and a preparation process of the crystal.
    Type: Application
    Filed: December 13, 2002
    Publication date: August 7, 2003
    Inventors: Takanori Ushio, Hidenori Miuta, Keiko Nagai
  • Patent number: 5993795
    Abstract: A protein composition derived from sesame seed is disclosed, which contains 40-95% by weight of crude proteins, 1-50% by weight of carbohydrate, 0-5% by weight of fat, 0-1% by weight of fiber, and 0.2-3% by weight of physiologically active substances derived from sesame seed, based on the dry weight of the composition and which is characterized in that when the protein composition is suspended at room temperature in pure water of pH 7 at a concentration of 5% by weight, not less than 80% by weight of the protein composition is dissolved in the pure water. A foodstuff or a cosmetic article containing the protein composition is also disclosed.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 30, 1999
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Toshihiko Osawa, Keiko Nagai, Kyoko Shibuya
  • Patent number: 5908775
    Abstract: The invention provides a method of textile printing using microorganisms with less limitation to dyes with less damage on base materials, and with less blurring of color borders. The method is capable of producing a complex, fine pattern; capable of realizing colored discharge printing with brilliant colors; and capable of readily producing an ombre pattern. The invention also provides a microorganism for decolorization of azo-system dye and use in the textile printing method. In accordance with the invention, textile printing is carried out by coating a solution or paste (which may contain a dye) containing a bacterial strain Bacillus OY1-2 of genus Bacillus (Deposit Number: FERM 13118), in a desirable pattern on the cloth dyed with an azo dye (which may include a non-azo dye), subsequently proliferating or acting the bacterial strain while keeping the strain in a wet state, and to entirely or partially metabolize the azo dye to eliminate or decrease the coloring of the azo dye for textile printing.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: June 1, 1999
    Assignees: Okasa Prefecture, Yushiro Chemical Industry Co., Ltd.
    Inventors: Wataru Sugiura, Keiko Nagai, Tadashi Yokoyama
  • Patent number: 5872002
    Abstract: The invention provides a method of textile printing using microorganisms with less limitation to dyes with less damage on base materials, and with less blurring of color borders. The method is capable of producing a complex, fine pattern; capable of realizing colored discharge printing with brilliant colors; and capable of readily producing an ombre pattern. The invention also provides a microorganism for decolorization of azo-system dye and use in the textile printing method.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: February 16, 1999
    Assignee: Yushiro Chemical Industry Co., Ltd.
    Inventors: Wataru Sugiura, Keiko Nagai, Tadashi Yokoyama
  • Patent number: 5869322
    Abstract: The invention provides a method of textile printing using microorganisms with less limitation to dyes, with less damage on base materials, and with less blurring of color borders. The method is capable of producing a complex, fine pattern; capable of realizing colored discharge printing with brilliant colors; and capable of readily producing an ombre pattern. The invention also provides a microorganism for decolorization of azo-system dye and use in the textile printing method.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: February 9, 1999
    Assignee: Yushiro Chemical Industry Co., Ltd.
    Inventors: Wataru Sugiura, Keiko Nagai, Tadashi Yokoyama