Patents by Inventor Yohko Akiyama

Yohko Akiyama 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: 6428813
    Abstract: In order to provide a composition having a long gastroduodenal residence time and exhibiting an improved efficacy, is provided a gastrointestinal mucosa-adherent composition comprising an active ingredient and a material which swells a viscogenic agent capable of being viscous with water a (e.g. curdlan and/or a low-substituted hydroxypropylcellulose etc.).
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: August 6, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Naoki Nagahara, Megumi Kitano, Masafumi Nakao
  • Patent number: 6423869
    Abstract: A compound of the formula (I): wherein R1 represents an amino group which may be substituted; R2 represents a carboxy group which may be esterified or amidated; R3, R4, R5 and R6 each represent a hydroxy group which may be protected; Q represents an aryl group which may be substituted; or a salt thereof is disclosed. The compound (I) possesses ant-Helicobacter pylori activity, and is useful in the prevention or treatment of various diseases associated with Helicobacter bacteria, such as duodenal ulcer, gastric ulcer, chronic gastritis and cancer of the stomach.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: July 23, 2002
    Assignee: Takeda Chemical Industries, Inc.
    Inventors: Ken-ichiro Miyagawa, Shigetoshi Tsubotani, Masafumi Nakao, Yoshitaka Nakano, Keiji Kamiyama, Motoo Izawa, Yohko Akiyama, Yuji Nishikimi
  • Patent number: 6368635
    Abstract: A solid matrix composition which is solid at ambient temperature, which comprises a viscogenic agent, such as an acrylic acid polymer, capable of developing viscosity on contact with water, as dispersed at least in the neighborhood of the surface layer of a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient. The matrix may be such that a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient has been coated with a coating composition containing at least one viscogenic agent. Such composition can adhere to the digestive tract and remain there for a prolonged period of time, thereby increasing the bioavailability of the active ingredient. Solid preparations, such as fine granules and granules, contain the above matrix composition.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: April 9, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Naoki Nagahara, Shin-ichiro Hirai
  • Patent number: 6319904
    Abstract: The present invention includes a formulation which comprises an antibacterial substance and an antiulcer substance, wherein at least either of them is formulated into a gastrointestinal mucosa-adherent solid preparation. The formulation of the present invention shows long retention time in the gastrointestinal tract because of adhesion to the gastrointestinal tract mucosa, synergetically enhances the pharmaceutical effects of an antibacterial substance, specially antibiotic against Helicobacter pylori (HP) and an antiulcer substance, with very low doses of active ingredients, particularly the anti-HP antibiotic with low prevalence of side effects. The present agent is useful as an antiulcer agent, showing potent anti-HP activity.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: November 20, 2001
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Masafumi Nakao, Naoki Nagahara, Susumu Iwasa
  • Publication number: 20010027192
    Abstract: The present invention includes a formulation which comprises an antibacterial substance and an antiulcer substance, wherein at least either of them is formulated into a gastrointestinal mucosa-adherent solid preparation. The formulation of the present invention shows long retention time in the gastrointestinal tract because of adhesion to the gastrointestinal tract mucosa, synergetically enhances the pharmaceutical effects of an antibacterial substance, specially antibiotic against Helicobacter pylori (HP) and an antiulcer substance, with very low doses of active ingredients, particularly the anti-HP antibiotic with low prevalence of side effects. The present agent is useful as an antiulcer agent, showing potent anti-HP activity.
    Type: Application
    Filed: May 17, 2001
    Publication date: October 4, 2001
    Inventors: Yohko Akiyama, Masafumi Nakao, Naoki Nagahara, Susumu Iwasa
  • Patent number: 6245351
    Abstract: A controlled-release composition comprising a drug-containing core coated with a coating composition containing a water-insoluble substance and a swellable polymer having no basic groups which is capable of maintaining an almost constant drug concentration in plasma over an extended period of time to ensure sustained drug action in the body.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: June 12, 2001
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Nara, Yohko Akiyama, Kenji Nakamura
  • Patent number: 5948773
    Abstract: The present invention includes a formulation which comprises an antibacterial substance and an antiulcer substance, wherein at least either of them is formulated into a gastrointestinal mucosa-adherent solid preparation. The formulation of the present invention shows long retention time in the gastrointestinal tract because of adhesion to the gastrointestinal tract mucosa, synergetically enhances the pharmaceutical effects of an antibacterial substance, specially antibiotic against Helicobacter pylori (HP) and an antiulcer substance, with very low doses of active ingredients, particularly the anti-HP antibiotic with low prevalence of side effects. The present agent is useful as an anti ulcer agent, showing potent anti-HP activity.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: September 7, 1999
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Masafumi Nakao, Naoki Nagahara, Susumu Iwasa
  • Patent number: 5846562
    Abstract: The present invention relates to a pharmaceutical composition for oral administration in which a fumagillol derivative is stabilized and exhibits remarkable antiangiogenesis activity in oral administration.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: December 8, 1998
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Shigeo Yanai, Katsuichi Sudo, Yohko Akiyama, Naoki Nagahara
  • Patent number: 5731006
    Abstract: A solid matrix composition which is solid at ambient temperature, which comprises a viscogenic agent, such as an acrylic acid polymer, capable of developing viscosity on contact with water, as dispersed at least in the neighborhood of the surface layer of a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient. The matrix may be such that a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient has been coated with a coating composition containing at least one viscogenic agent. Such composition can adhere to the digestive tract and remain there for a prolonged period of time, thereby increasing the bioavailability of the active ingredient. Solid preparations, such as fine granules and granules, contain the above matrix composition.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: March 24, 1998
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Naoki Nagahara, Shin-ichiro Hirai
  • Patent number: 5593690
    Abstract: There is provided a matrix preparation produced by dispersing a pharmaceutically active ingredient into a matrix which is solid at ambient temperature and comprised of a fatty acid ester of a polyglycerol. The preparation has stable release-controlling ability, can be processed to fine granules, granules, capsules, tablets etc., and contributes to reduce the administration times of the active ingredient and side effects of the ingredient.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: January 14, 1997
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Hidetoshi Horibe, Minoru Yoshioka
  • Patent number: 5576025
    Abstract: A solid matrix composition which is solid at ambient temperature, which comprises a viscogenic agent, such as an acrylic acid polymer, capable of developing viscosity on contact with water, as dispersed at least in the neighborhood of the surface layer of a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient. The matrix may be such that a matrix particle containing a polyglycerol fatty acid ester or a lipid and an active ingredient has been coated with a coating composition containing at least one viscogenic agent. Such composition can adhere to the digestive tract and remain there for a prolonged period of time, thereby increasing the bioavailability of the active ingredient. Solid preparations, such as fine granules and granules, contain the above matrix composition.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: November 19, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Naoki Nagahara, Shin-ichiro Hirai
  • Patent number: 5399357
    Abstract: There is provided a matrix preparation produced by dispersing a pharmaceutically active ingredient into a matrix which is solid at ambient temperature and comprised of a fatty acid ester of a polyglycerol. The preparation has stable release controlling ability, can be processed to fine granules, granules, capsules, tablets etc., and contributes to reduction of the administration times of the active ingredient and side effects of the ingredient.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: March 21, 1995
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Hidetoshi Horibe, Minoru Yoshioka
  • Patent number: 5189148
    Abstract: Disclosed are (1) a stabilized FGF protein composition which comprises an FGF protein and water-insoluble hydroxypropyl cellulose; (2) a method for preparing a stabilized FGF protein composition, which comprises admixing an FGF protein with a water-insoluble hydroxypropyl cellulose; and (3) a method for stabilizing an FGF protein which comprises admixing an FGF protein with a water-insoluble hydroxypropyl cellulose, whereby the stabilized FGF protein can be provided. The composition is obtained in a solid state which has improved stability.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: February 23, 1993
    Assignee: Takeda Chemical Industries, Inc.
    Inventors: Yohko Akiyama, Minoru Yoshioka, Nobuyuki Kitamori
  • Patent number: 5162057
    Abstract: Fatty acid esters of polyglycerols, such as stearic acid penta(tetra)glyceryl ester, behenic acid hexa(tetra)glyceryl ester, lauric acid mono(deca)glyceryl ester, oleic acid di(tri)glyceryl ester, linolic acid di(hepta)glyceryl ester, palmitic acid deca(deca)glyceryl ester, etc. are employed as coating agents for coating solid preparations such as tablets, pills, granules, fine granules, etc. By coating with the coating agents, stable sustained release of active ingredients contained in the preparations is obtained, even after a long period of storage.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: November 10, 1992
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yohko Akiyama, Naoki Nagahara, Minoru Yoshioka