Patents by Inventor Hisami Yamaguchi

Hisami Yamaguchi 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: 20080213383
    Abstract: The present invention relates to fine particles of a poorly water-soluble drug wherein a predetermined enteric material is adsorbed as the dispersant on the surface of a poorly water-soluble drug, as well as a method for producing the same fine particles. It is possible to efficiently and safely produce in a short amount of time fine particles with which absorption of a poorly water-soluble drug that is poorly absorbed in humans, and the like can be improved, and a pharmaceutical preparation with excellent dispersion stability can be provided, by using the fine particles of the present invention having an improved dissolution profile.
    Type: Application
    Filed: September 5, 2006
    Publication date: September 4, 2008
    Applicant: Astellas Pharma Inc.
    Inventors: Hisami Yamaguchi, Tetsuo Tominaga
  • Publication number: 20070134325
    Abstract: This invention provides ?-lactam antibiotic-containing tablets capable of being orally taken either as such owing to their being small-sized, hence still easily swallowable, or, in the case of administration to the aged encountering some difficulty in swallowing, in the form of dispersions resulting from easy self-disintegration upon being dropped into water in a glass as well as a method of producing the same. The tablets of this invention comprise, on the per-tablet basis, 60-85% by weight of a ?-lactam antibiotic, 1-10% by weight of low-substituted hydroxypropylcellulose and/or crosslinked polyvinylpyrrolidone as a disintegrator, and 0.5-2% by weight of a binder. Granules to be compressed for tableting are prepared using water or an aqueous solution of ethanol or the like.
    Type: Application
    Filed: February 26, 2007
    Publication date: June 14, 2007
    Applicant: Astellas Pharma Inc.
    Inventor: Hisami YAMAGUCHI
  • Publication number: 20050003001
    Abstract: The present invention is to provide a method for improving the dissolution of a poorly dispersible medicament and that is achieved by preparing a granulated product where a floating agent is added to the poorly dispersible medicament.
    Type: Application
    Filed: October 30, 2002
    Publication date: January 6, 2005
    Inventors: Hisami Yamaguchi, Shuji Saka, Takao Ueda
  • Publication number: 20030129227
    Abstract: This invention provides &bgr;-lactam antibiotic-containing tablets capable of being orally taken either as such owing to their being small-sized, hence still easily swallowable, or, in the case of administration to the aged encountering some difficulty in swallowing, in the form of dispersions resulting from easy self-disintegration upon being dropped into water in a glass as well as a method of producing the same. The tablets of this invention comprise, on the per-tablet basis, 60-85% by weight of a &bgr;-lactam antibiotic, 1-10% by weight of low-substituted hydroxypropylcellulose and/or crosslinked polyvinylpyrrolidone as a disintegrator, and 0.5-2% by weight of a binder. Granules to be compressed for tableting are prepared using water or an aqueous solution of ethanol or the like.
    Type: Application
    Filed: January 17, 2003
    Publication date: July 10, 2003
    Applicant: Fujisawa Pharmaceutical Co. Ltd.
    Inventor: Hisami Yamaguchi
  • Publication number: 20020192281
    Abstract: This invention provides &bgr;-lactam antibiotic-containing tablets capable of being orally taken either as such owing to their being small-sized, hence still easily swallowable, or, in the case of administration to the aged encountering some difficulty in swallowing, in the form of dispersions resulting from easy self-disintegration upon being dropped into water in a glass as well as a method of producing the same. The tablets of this invention comprise, on the per-tablet basis, 60-85% by weight of a &bgr;-lactam antibiotic, 1-10% by weight of low-substituted hydroxypropylcellulose and/or crosslinked polyvinylpyrrolidone as a disintegrator, and 0.5-2% by weight of a binder. Granules to be compressed for tableting are prepared using water or an aqueous solution of ethanol or the like.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 19, 2002
    Applicant: Fujisawa Pharmaceutical Co., Ltd.
    Inventor: Hisami Yamaguchi
  • Patent number: 6423341
    Abstract: This invention provides &bgr;-lactam antibiotic-containing tablets capable of being orally taken either as such owing to their being small-sized, hence still easily swallowable, or, in the case of administration to the aged encountering some difficulty in swallowing, in the form of dispersions resulting from easy self-disintegration upon being dropped into water in a glass as well as a method of producing the same. The tablets of this invention comprise, on the per-tablet basis, 60-85% by weight of a &bgr;-lactam antibiotic, 1-10% by weight of low-substituted hydroxypropylcellulose and/or crosslinked polyvinylpyrrolidone as a disintegrator, and 0.5-2% by weight of a binder. Granules to be compressed for tableting are prepared using water or an aqueous solution of ethanol or the like.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: July 23, 2002
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventor: Hisami Yamaguchi
  • Publication number: 20020051816
    Abstract: This invention provides &bgr;-lactam antibiotic-containing tablets capable of being orally taken either as such owing to their being small-sized, hence still easily swallowable, or, in the case of administration to the aged encountering some difficulty in swallowing, in the form of dispersions resulting from easy self-disintegration upon being dropped into water in a glass as well as a method of producing the same. The tablets of this invention comprise, on the per-tablet basis, 60-85% by weight of a &bgr;-lactam antibiotic, 1-10% by weight of low-substituted hydroxypropylcellulose and/or crosslinked polyvinylpyrrolidone as a disintegrator, and 0.5-2% by weight of a binder. Granules to be compressed for tableting are prepared using water or an aqueous solution of ethanol or the like.
    Type: Application
    Filed: August 26, 1998
    Publication date: May 2, 2002
    Inventor: HISAMI YAMAGUCHI
  • Patent number: 4871549
    Abstract: The invention relates to a Time-Controlled Explosion System in which drug release is caused by explosion of a membrane after a definite time period, said System comprising a preparation in the form of a bead or granule, said preparation comprising a core, a drug, swelling agent and an outer membrane of water-insoluble coating material.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: October 3, 1989
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Yoshio Ueda, Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
  • Patent number: 4808416
    Abstract: The invention concerns the preparation of a slow-release drug characterized by the coating of a core comprising a therapeutically active principle by means of a substance which retards its release and by means of an additional layer consisting of an enteric substance.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: February 28, 1989
    Assignee: Laboratories Delagrange
    Inventors: Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
  • Patent number: 4488656
    Abstract: A stopper for a vial has a top portion and legs extending therefrom. The free or distal end of the legs have cut outs on each of the circumferential sides. The cut outs can be either straight or curved and are of such a size that the stopper can be securely held when partially fitted in a vial. The cut outs prevent the stoppers from becoming entangled during pre-treatment.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: December 18, 1984
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hisatomi Fukuoka, Hisami Yamaguchi