Patents by Inventor Kazuhiro Sako

Kazuhiro Sako 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: 11707451
    Abstract: A pharmaceutical composition for modified release comprising (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide or a pharmaceutically acceptable salt thereof, and a carrier for a sustained release pharmaceutical composition, wherein a maximum blood drug concentration (Cmax) when administered in a fasted state is 400 ng/mL or less, is disclosed.
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: July 25, 2023
    Assignee: ASTELLAS PHARMA INC.
    Inventors: Yuuki Takaishi, Soichiro Nakamura, Yutaka Takahashi, Takashi Nishizato, Daisuke Murayama, Emiko Murayama, Kazuhiro Sako
  • Publication number: 20210322387
    Abstract: A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 10 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25 C is disclosed.
    Type: Application
    Filed: November 19, 2020
    Publication date: October 21, 2021
    Inventors: YUUKI TAKAISHI, YUTAKA TAKAHASHI, TAKASHI NISHIZATO, DAISUKE MURAYAMA, EMIKO MURAYAMA, SOICHIRO NAKAMURA, KAZUHIRO SAKO
  • Publication number: 20210085654
    Abstract: A pharmaceutical composition for modified release comprising (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide or a pharmaceutically acceptable salt thereof, and a carrier for a sustained release pharmaceutical composition, wherein a maximum blood drug concentration (Cmax) when administered in a fasted state is 400 ng/mL or less, is disclosed.
    Type: Application
    Filed: December 8, 2020
    Publication date: March 25, 2021
    Inventors: YUUKI TAKAISHI, SOICHIRO NAKAMURA, YUTAKA TAKAHASHI, TAKASHI NISHIZATO, DAISUKE MURAYAMA, EMIKO MURAYAMA, KAZUHIRO SAKO
  • Patent number: 10842780
    Abstract: A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 10 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25° C. is disclosed.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: November 24, 2020
    Assignee: ASTELLAS PHARMA INC.
    Inventors: Yuuki Takaishi, Yutaka Takahashi, Takashi Nishizato, Daisuke Murayama, Emiko Murayama, Soichiro Nakamura, Kazuhiro Sako
  • Publication number: 20170231965
    Abstract: A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 10 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25° C. is disclosed.
    Type: Application
    Filed: February 14, 2017
    Publication date: August 17, 2017
    Applicant: ASTELLAS PHARMA INC.
    Inventors: YUUKI TAKAISHI, YUTAKA TAKAHASHI, TAKASHI NISHIZATO, DAISUKE MURAYAMA, EMIKO MURAYAMA, SOICHIRO NAKAMURA, KAZUHIRO SAKO
  • Publication number: 20160184275
    Abstract: A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 10 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25° C. is disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: June 30, 2016
    Applicant: ASTELLAS PHARMA INC.
    Inventors: YUUKI TAKAISHI, YUTAKA TAKAHASHI, TAKASHI NISHIZATO, DAISUKE MURAYAMA, EMIKO MURAYAMA, SOICHIRO NAKAMURA, KAZUHIRO SAKO
  • Patent number: 9198904
    Abstract: The present invention relates to a pharmaceutical composition for oral administration comprising a modified release portion containing tamsulosin or a pharmaceutically acceptable salt thereof, and an immediate release portion containing solifenacin or a pharmaceutically acceptable salt thereof and a hydrophilic substance. In the pharmaceutical composition, the dissolution rate of each drug (in particular, solifenacin contained in the immediate release portion) is similar to those of the current single drug formulations, and the maximum percentage of drag dissolution of each drug (in particular, solifenacin contained in the immediate release portion) is 90% or more. Therefore, the pharmaceutical composition is a single formulation (i.e., a combined formulation) with a bioavailability equivalent to those of the current single drug formulations.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: December 1, 2015
    Assignee: ASTELLAS PHARMA INC.
    Inventors: Takehiko Yasuji, Noriyuki Kinoshita, Hiroyuki Yoshino, Shuuya Kawahama, Kazuhiro Sako, Akio Sugihara
  • Publication number: 20130137739
    Abstract: A solid dispersion comprising a poorly soluble pharmaceutical compound, such as 3-methoxy-1,5-bis(4-methoxyphenyl)-1H-1,2,4-triazole, which has excellent ease of handling and stability is provided. The solid dispersion comprises a polymeric carrier (for example, a polymer selected from a group consisting of polyvinylpyrrolidone and copolyvidone) and further comprising hydroxypropyl methylcellulose as desired.
    Type: Application
    Filed: May 27, 2011
    Publication date: May 30, 2013
    Inventors: Atsushi Sakurai, Kazuhiro Sako, Toshiro Sakai
  • Publication number: 20120214753
    Abstract: The present invention provides a solid pharmaceutical composition comprising a cocrystal of (1S)-1,5-anhydro-1-[3-(1-benzothien-2-ylmethyl)-4-fluorophenyl]-D-glucitol and L-proline, in combination with crystalline cellulose, and also provides a method for producing the composition.
    Type: Application
    Filed: October 22, 2010
    Publication date: August 23, 2012
    Inventors: Keisuke Sakaura, Yoshifumi Katakawa, Tetsuya Tamura, Kazuhiro Sako
  • Patent number: 8197846
    Abstract: The present invention provides a sustained-release pharmaceutical composition, characterized in that, there are contained tamsulosin or a pharmaceutically acceptable salt thereof and a carrier for a sustained-release pharmaceutical composition and, when a dissolution test is carried out according to Japanese Pharmacopoeia Dissolution Test Method 2, the tamsulosin release after 7 hours from the start of the dissolution is about 20 to about 85%.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 12, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Kazuhiro Sako, Toyohiro Sawada, Keiichi Yoshihara, Hiroyuki Kojima
  • Publication number: 20120088838
    Abstract: The present invention provides a sustained-release pharmaceutical composition, characterized in that there are contained tamsulosin or a pharmaceutically acceptable salt thereof and a carrier for a sustained-release pharmaceutical composition and the ratio (Cmin/Cmax ratio) of the plasma tamsulosin concentration at 24 hours after the administration of the preparation per os (Cmin) to the maximum plasma tamsulosin concentration after the administration (Cmax) is about 0.4 or more.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: Astellas Pharma Inc.
    Inventors: Kazuhiro Sako, Toyohiro Sawada, Hiromu Kondo, Keiichi Yoshihara, Hiroyuki Kojima
  • Patent number: 8135991
    Abstract: A flash memory is made to store a same boot program in a plurality of blocks in it. When a flash memory controller receives an access command for accessing the storage region storing the boot program from a CPU (Step S101), it outputs the read out data to the CPU only when the corresponding block is not faulty according to the determination (Steps S105, S106) made on the basis of the ECC contained in the data read out from the corresponding page and the determination (Step S109) made on the basis of the block information also contained in the data read out from the corresponding page. If, on the other hand it is determined that the block is faulty, the flash memory controller reads out the boot program stored in the next block (Steps S106, S103) and determines once again that the block is faulty or not faulty.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: March 13, 2012
    Assignee: Sony Corporation
    Inventors: Yoshito Katano, Tadashi Yoshida, Kazuhiro Sako
  • Patent number: 8128958
    Abstract: The present invention provides a sustained-release pharmaceutical composition, characterized in that, there are contained tamsulosin or a pharmaceutically acceptable salt thereof and a carrier for a sustained-release pharmaceutical composition and the ratio (Cmin/Cmax ratio) of the plasma tamsulosin concentration at 24 hours after the administration of the preparation per os (Cmin) to the maximum plasma tamsulosin concentration after the administration (Cmax) is about 0.4 or more.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: March 6, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Kazuhiro Sako, Toyohiro Sawada, Hiromu Kondo, Keiichi Yoshihara, Hiroyuki Kojima
  • Patent number: 7871644
    Abstract: The present invention presents a pharmaceutical composition for oral use with improved absorption, which comprises drug, aminoalkyl methacrylate copolymer E, and acidic substance and is obtained by bringing said 3 components together and uniformly mixing at least this polymer and this acidic substance, and a method of improving oral absorption/by using this pharmaceutical composition. Moreover, the present invention presents an agent for improving oral absorption that increases drug permeability of the digestive tract mucous membrane and/or mucous layer present on the surface of this membrane, whose active ingredient is aminoalkyl methacrylate copolymer E. In addition, the present invention presents an oral agent for improving absorption by increasing drug permeability of the digestive tract mucous membrane and/or the mucous layer distributed over this mucous membrane, whose effective component is aminoalkyl methacrylate copolymer E.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: January 18, 2011
    Assignee: Astellas Pharma Inc.
    Inventors: Shunsuke Watanabe, Shigeo Takemura, Yuuki Tsutsui, Himoru Kondo, Kiyo Nakanishi, Kazuhiro Sako, Toyohiro Sawada
  • Patent number: 7816373
    Abstract: The present invention relates to a method for improving adsorption on the gastrointestinal mucous layers of one or more selected from polyethylene glycol, polyethylene oxide, and polyoxyethylene polypropylene copolymer wherein the average number of repeating oxyethylene units of one ethylene oxide chain length is 17 or greater. It is possible to enhance pharmacological effects by using the present invention with drugs that have anti-H. pylori activity.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: October 19, 2010
    Assignee: Astellas Pharma Inc.
    Inventors: Keiichi Yoshihara, Kazuhiro Sako
  • Publication number: 20100233260
    Abstract: The present invention relates to a pharmaceutical composition for oral administration comprising a modified release portion containing tamsulosin or a pharmaceutically acceptable salt thereof, and an immediate release portion containing solifenacin or a pharmaceutically acceptable salt thereof and a hydrophilic substance. In the pharmaceutical composition, the dissolution rate of each drug (in particular, solifenacin contained in the immediate release portion) is similar to those of the current single drug formulations, and the maximum percentage of drag dissolution of each drug (in particular, solifenacin contained in the immediate release portion) is 90% or more. Therefore, the pharmaceutical composition is a single formulation (i.e., a combined formulation) with a bioavailability equivalent to those of the current single drug formulations.
    Type: Application
    Filed: February 2, 2010
    Publication date: September 16, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Takehiko Yasuji, Noriyuki Kinoshita, Hiroyuki Yoshino, Shuuya Kawahama, Kazuhiro Sako, Akio Sugihara
  • Publication number: 20100151034
    Abstract: A granular pharmaceutical composition for oral administration, comprising (1) atorvastatin or a pharmaceutically acceptable salt thereof, (2) a surfactant selected from the group consisting of sodium laurylsulfate and polyoxyethylene hydrogenated castor oil, and (3) a water-soluble polymer, is disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: June 17, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Takeshi Yano, Soichiro Nakamura, Hiroaki Tasaki, Kazuhiro Sako
  • Publication number: 20100144711
    Abstract: A pharmaceutical composition for oral administration, comprising 3-hydroxy-N1-(4-methoxybenzoyl)-N2-[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]-1,2-phenylenediamine or a pharmaceutically acceptable salt thereof, and hydroxypropyl cellulose having a viscosity of approximately 6 mPa·S (inclusive) to approximately 150 mPa·S (exclusive) in a 2% aqueous solution at 20° C., or a viscosity of 75 mPa·S (inclusive) to 400 mPa·S (inclusive) in a 5% aqueous solution at 25° C., and a process of manufacturing the pharmaceutical composition for oral administration are disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: June 10, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Shinsuke Oba, Takehiko Yasuji, Tadashi Hakomori, Kazuhiro Sako
  • Publication number: 20100144807
    Abstract: A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 5 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25° C. is disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: June 10, 2010
    Applicant: Astellas Pharma Inc
    Inventors: Yuuki Takaishi, Yutaka Takahashi, Takashi Nishizato, Daisuke Murayama, Emiko Murayama, Soichiro Nakamura, Kazuhiro Sako
  • Publication number: 20100136110
    Abstract: A granular pharmaceutical composition for oral administration, wherein a drug-containing particle is coated with a coating comprising a methyl methacrylate-butyl methacrylate-dimethylaminoethyl methacrylate copolymer and a water-soluble polymer is disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: June 3, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Hiroaki Tasaki, Atsushi Maeda, Takeshi Yano, Kazuhiro Sako