Patents by Inventor Toyomi Sato

Toyomi Sato 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).

  • Composition comprising a crystallographically stable, amorphous cephalosporin and processes for the preparation thereof
    Patent number: 6486149
    Abstract: Processes are provided for the preparation of orally administrable, yellow and powdery compositions essentially consisting of particles composed of a homogeneous mixture of an amorphous Cefditoren pivoxil substance with a water soluble high-molecular additive. These compositions can be produced by dissolving crystalline Cefditoren pivoxil substance and the water-soluble high-molecular additive in an aqueous solution of an acid, then neutralizing the resultant solution, to co-precipitate the product, and drying the thus precipitated product, followed by recovering the product in the form of the above-mentioned particles.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: November 26, 2002
    Assignee: Meiji Seika Kaisha Ltd.
    Inventors: Masahiro Onodera, Masamichi Sukegawa, Kiyoshi Yasui, Tatsuo Watanabe, Toyomi Sato, Yasushi Murai, Katsuharu Iinuma
  • Composition comprising a crystallographically stable, amorphous cephalosporin and processes for the preparation thereof
    Publication number: 20020037322
    Abstract: Processes are provided for the preparation of orally administrable, yellow and powdery compositions essentially consisting of particles composed of a homogeneous mixture of an amorphous Cefditoren pivoxil substance with a water soluble high-molecular additive. These compositions can be produced by dissolving crystalline Cefditoren pivoxil substance and the water-soluble high-molecular additive in an aqueous solution of an acid, then neutralizing the resultant solution, to co-precipitate the product, and drying the thus precipitated product, followed by recovering the product in the form of the above-mentioned particles.
    Type: Application
    Filed: November 26, 2001
    Publication date: March 28, 2002
    Inventors: Masahiro Onodera, Masamichi Sukegawa, Kiyoshi Yasui, Tatsuo Watanabe, Toyomi Sato, Yasushi Murai, Katsuharu Iinuma
  • Crystallographically stable amorphous cephalosporin compositions and process for producing the same
    Patent number: 6342493
    Abstract: Processes are provided for the preparation of orally administrable, yellow and powdery compositions essentially consisting of particles composed of a homogeneous mixture of an amorphous Cefditoren pivoxil substance with a water soluble high-molecular additive. These compositions can be produced by dissolving crystalline Cefditoren pivoxil substance and the water-soluble high-molecular additive in an aqueous solution of an acid, then neutralizing the resultant solution, to co-precipitate the product, and drying the thus precipitated product, followed by recovering the product in the form of the above-mentioned particles.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: January 29, 2002
    Assignee: Meiji Seika Kaisha Ltd.
    Inventors: Masahiro Onodera, Masamichi Sukegawa, Kiyoshi Yasui, Tatsuo Watanabe, Toyomi Sato, Yasushi Murai, Katsuharu Iinuma
  • Porous microspheres for drug delivery and methods for making same
    Patent number: 4818542
    Abstract: Controlled release drug delivery systems comprised of spherical microporous polymeric network of interconnecting channels containing pore incorporated drugs or other agents wherein the drugs or agents are confined within the pore channel are described. Also disclosed are processing parameters in connection with the novel method of the invention for obtaining drug delivery systems especially suited for parenteral as well as oral administration.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: April 4, 1989
    Assignee: The University of Kentucky Research Foundation
    Inventors: Patrick P. DeLuca, Motoko Kanke, Toyomi Sato, Hans G. Schroeder
  • Process for preparation of stable amorphous macrolide antibiotic solids
    Patent number: 4127647
    Abstract: Amorphous solids of macrolide antibiotics which are stable with the passage of time are prepared by dissolving a macrolide antibiotic and a cellulose polymer selected from the group consisting of ethyl cellulose, hydroxypropyl cellulose and hydroxypropylmethyl cellulose as a stabilizing substance in a volatile organic solvent selected from the group consisting of dichloromethane, 1,1,1-trichloroethane and chloroform and spray drying the resulting solution.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: November 28, 1978
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Toyomi Sato, Toshiyuki Kobayashi, Takeshi Mayama, Akira Okada