Patents by Inventor Hiroshi Sakashita

Hiroshi Sakashita 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: 9657043
    Abstract: The present invention provides a compound represented by the following formula (I): wherein each symbol is as described in the DESCRIPTION, which has a superior peripheral blood lymphocyte decreasing action, and is useful for the treatment or prophylaxis of autoimmune diseases; prophylaxis or suppression of resistance or acute rejection or chronic rejection of transplantation of organ or tissue; treatment or prophylaxis of graft-versus-host (GvH) disease due to bone marrow transplantation; or treatment or prophylaxis of allergic diseases.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: May 23, 2017
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Maiko Hamada, Kaoru Tashiro, Hiroshi Sakashita, Masatoshi Kiuchi, Shuzo Takeda, Kunitomo Adachi
  • Publication number: 20150087620
    Abstract: The present invention provides a compound represented by the following formula (I): wherein each symbol is as described in the DESCRIPTION, which has a superior peripheral blood lymphocyte decreasing action, and is useful for the treatment or prophylaxis of autoimmune diseases; prophylaxis or suppression of resistance or acute rejection or chronic rejection of transplantation of organ or tissue; treatment or prophylaxis of graft-versus-host (GvH) disease due to bone marrow transplantation; or treatment or prophylaxis of allergic diseases.
    Type: Application
    Filed: April 23, 2013
    Publication date: March 26, 2015
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Maiko Hamada, Kaoru Tashiro, Hiroshi Sakashita, Masatoshi Kiuchi, Shuzo Takeda, Kunitomo Adachi
  • Patent number: 8604198
    Abstract: The present invention provides 3-{(2S,4S)-4-[4-(3-methyl -1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl]pyrrolidin-2 -ylcarbonyl}thiazolidine (compound I) useful as a dipeptidyl peptidase-IV inhibitor, which has superior properties of stability and hygroscopicity, and reproducible crystal structure, and a production method thereof.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Tomohiro Yoshida, Hiroshi Sakashita, Naoko Ueda, Shinji Kirihara, Satoru Uemori, Reiko Tsutsumiuchi, Fumihiko Akahoshi
  • Patent number: 8597835
    Abstract: Provided is a positive electrode material for a safe, high capacity, long lifetime lithium ion secondary battery capable of large current charging and discharging. The positive electrode material contains between 5% by mass or more and 30% by mass or less of a carbon black composite formed by joining together fibrous carbon and carbon black wherein ash is 1.0% or less by mass in accordance with JIS K 1469 and the remainder includes olivine-type lithium iron phosphate, and volatile oxygen-containing functional groups which constitutes 1.0% or less by mass of the positive electrode material. The fibrous carbon is preferably a nanotube having a fiber diameter of 5 nm or more and 50 nm or less and a specific surface area between 50 m2/g or more and 400 m2/g or less.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: December 3, 2013
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takashi Kawasaki, Hiroshi Sakashita, Takehiko Sawai, Shinji Saito
  • Patent number: 8461209
    Abstract: The invention provides a sulfonyl malonamide derivative, or a pharmacologically acceptable salt thereof or a solvate thereof, that has therapeutic and/or preventive effects(s) on various diseases due to its agonist action at AT2 receptor, and is useful as a pharmaceutical agent for the treatment and/or prevention of diseases involving the renin-angiotensin-aldosterone system (RAAS).
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: June 11, 2013
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Tomohiro Yoshida, Hiroshi Sakashita, Atsushi Numata, Saori Tahara, Hisashi Kawasumi
  • Publication number: 20120258363
    Abstract: Provided is a positive electrode material for a safe, high capacity, long lifetime lithium ion secondary battery capable of large current charging and discharging. The positive electrode material contains between 5% by mass or more and 30% by mass or less of a carbon black composite formed by joining together fibrous carbon and carbon black wherein ash is 1.0% or less by mass in accordance with JIS K 1469 and the remainder includes olivine-type lithium iron phosphate, and volatile oxygen-containing functional groups which constitutes 1.0% or less by mass of the positive electrode material. The fibrous carbon is preferably a nanotube having a fiber diameter of 5 nm or more and 50 nm or less and a specific surface area between 50 m2/g or more and 400 m2/g or less.
    Type: Application
    Filed: May 16, 2012
    Publication date: October 11, 2012
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Takashi KAWASAKI, Hiroshi SAKASHITA, Takehiko SAWAI, Shinji SAITO
  • Patent number: 8119033
    Abstract: The present invention provides a granulated acetylene black which can be easily and well dispersed when it is incorporated in at least one of a resin and a rubber, the process for producing it, and its composition. A granulated acetylene black has an average aspect ratio of at most 1.1, an average maximum particle size of from 0.2 mm to 1 mm and an average particle size of from 0.2 to 0.6 mm. The granulated acetylene black is produced, after stirring and granulating a mixture containing from 35 to 50 mass % of an acetylene black original powder having an iodine adsorption amount of from 80 to 100 mg/g and a DBP absorption amount of from 140 to 220 ml/100 g and from 50 to 65 mass % of water, and subjecting to selection treatment, classification treatment or both treatments.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: February 21, 2012
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hiroshi Sakashita
  • Publication number: 20110282058
    Abstract: The present invention provides 3-{(2S,4S)-4-[4-(3-methyl-1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl]pyrrolidin-2-ylcarbonyl}thiazolidine (compound I) useful as a dipeptidyl peptidase-IV inhibitor, which has superior properties of stability and hygroscopicity, and reproducible crystal structure, and a production method thereof.
    Type: Application
    Filed: July 29, 2011
    Publication date: November 17, 2011
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Tomohiro YOSHIDA, Hiroshi SAKASHITA, Naoko UEDA, Shinji KIRIHARA, Satoru UEMORI, Reiko TSUTSUMIUCHI, Fumihiko AKAHOSHI
  • Patent number: 8003790
    Abstract: The present invention provides 3-{(2S,4S)-4-[4-(3-methyl-1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl]pyrrolidin-2-ylcarbonyl}thiazolidine (compound I) useful as a dipeptidyl peptidase-IV inhibitor, which has superior properties of stability and hygroscopicity, and reproducible crystal structure, and a production method thereof.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: August 23, 2011
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Tomohiro Yoshida, Hiroshi Sakashita, Naoko Ueda, Shinji Kirihara, Satoru Uemori, Reiko Tsutsumiuchi, Fumihiko Akahoshi
  • Publication number: 20100320424
    Abstract: The present invention provides a granulated acetylene black which can be easily and well dispersed when it is incorporated in at least one of a resin and a rubber, the process for producing it, and its composition. A granulated acetylene black having an average aspect ratio of at most 1.1, an average maximum particle size of from 0.2 mm to 1 mm and an average particle size of from 0.2 to 0.6 mm. The granulated acetylene black is produced, after stirring and granulating a mixture containing from 35 to 50 mass % of an acetylene black original powder having an iodine adsorption amount of from 80 to 100 mg/g and a DBP absorption amount of from 140 to 220 ml/100 g and from 50 to 65 mass % of water, and subjecting to selection treatment, classification treatment or both treatments.
    Type: Application
    Filed: October 19, 2007
    Publication date: December 23, 2010
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hiroshi Sakashita
  • Publication number: 20100228026
    Abstract: The invention provides a sulfonyl malonamide derivative, or a pharmacologically acceptable salt thereof or a solvate thereof, that has therapeutic and/or preventive effect(s) on various diseases due to its agonist action at AT2 receptor, and is useful as a pharmaceutical agent for the treatment and/or prevention of diseases involving the renin-angiotensin-aldosterone system (RAAS).
    Type: Application
    Filed: June 19, 2008
    Publication date: September 9, 2010
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Tomohiro Yoshida, Hiroshi Sakashita, Atsushi Numata, Saori Tahara, Hisashi Kawasumi
  • Patent number: 7790725
    Abstract: A thiazolidine derivative represented by the formula (I) wherein each symbol is as defined in the specification, and a pharmaceutically acceptable salt thereof exhibit a potent DPP-IV inhibitory activity, and can be provided as an agent for the prophylaxis or treatment of diabetes, an agent for the prophylaxis or treatment of obesity and the like.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: September 7, 2010
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Hiroshi Sakashita, Tomohiro Yoshida, Hiroshi Kitajima, Masahiro Takeuchi, Yoshihito Tanaka, Takuya Yoshimura, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Publication number: 20090216016
    Abstract: The present invention provides 3-{(2S,4S)-4-[4-(3-methyl-1-phenyl-1H -pyrazol-5-yl)piperazin-1-yl]pyrrolidin-2-ylcarbonyl}thiazolidine (compound I) useful as a dipeptidyl peptidase-IV inhibitor, which has superior properties of stability and hygroscopicity, and reproducible crystal structure, and a production method thereof.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 27, 2009
    Applicant: MITSUBISHI PHARMA CORPORATION
    Inventors: Tomohiro Yoshida, Hiroshi Sakashita, Naoko Ueda, Shinji Kirihara, Satoru Uemori, Reiko Tsutsumiuchi, Fumihiko Akahoshi
  • Publication number: 20070259880
    Abstract: A thiazolidine derivative represented by the formula (I) wherein each symbol is as defined in the specification, and a pharmaceutically acceptable salt thereof exhibit a potent DPP-IV inhibitory activity, and can be provided as an agent for the prophylaxis or treatment of diabetes, an agent for the prophylaxis or treatment of obesity and the like.
    Type: Application
    Filed: July 9, 2007
    Publication date: November 8, 2007
    Applicant: MITSUBISHI PHARMA CORPORATION
    Inventors: Hiroshi SAKASHITA, Tomohiro YOSHIDA, Hiroshi KITAJIMA, Masahiro TAKEUCHI, Yoshihito TANAKA, Takuya YOSHIMURA, Fumihiko AKAHOSHI, Yoshiharu HAYASHI
  • Publication number: 20060173056
    Abstract: The present invention aims at providing compounds having therapeutic effects due to a DPP-IV inhibitory action, and satisfactory as pharmaceutical products. The present inventors have found that derivatives having a substituent introduced into the ?-position of proline represented by the formula (I) wherein each symbol is as defined in the specification, have a potent DPP-IV inhibitory activity, and completed the present invention by increasing the stability.
    Type: Application
    Filed: February 10, 2006
    Publication date: August 3, 2006
    Inventors: Hiroshi Kitajima, Hiroshi Sakashita, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Patent number: 7074794
    Abstract: The present invention aims at providing compounds having therapeutic effects due to a DPP-IV inhibitory action, and satisfactory as pharmaceutical products. The present inventors have found that derivatives having a substituent introduced into the ?-position of proline represented by the formula (I) wherein each symbol is as defined in the specification, have a potent DPP-IV inhibitory activity, and completed the present invention by increasing the stability.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: July 11, 2006
    Assignee: Mitsubishi Pharma Corporation
    Inventors: Hiroshi Kitajima, Hiroshi Sakashita, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Patent number: 7060722
    Abstract: The present invention aims at providing compounds having therapeutic effects due to a DPP-IV inhibitory action, and satisfactory as pharmaceutical products. The present inventors have found that derivatives having a substituent introduced into the ?-position of proline represented by the formula (I) wherein each symbol is as defined in the specification, have a potent DPP-IV inhibitory activity, and completed the present invention by increasing the stability.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: June 13, 2006
    Assignee: Mitsubishi Pharma Corporation
    Inventors: Hiroshi Kitajima, Hiroshi Sakashita, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Publication number: 20050245538
    Abstract: The present invention aims at providing compounds having therapeutic effects due to a DPP-IV inhibitory action, and satisfactory as pharmaceutical products. The present inventors have found that derivatives having a substituent introduced into the ?-position of proline represented by the formula (I) wherein each symbol is as defined in the specification, have a potent DPP-IV inhibitory activity, and completed the present invention by increasing the stability.
    Type: Application
    Filed: June 2, 2005
    Publication date: November 3, 2005
    Inventors: Hiroshi Kitajima, Hiroshi Sakashita, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Publication number: 20040259883
    Abstract: A thiazolidine derivative represented by the formula (I) 1
    Type: Application
    Filed: April 21, 2004
    Publication date: December 23, 2004
    Inventors: Hiroshi Sakashita, Tomohiro Yoshida, Hiroshi Kitajima, Masahiro Takeuchi, Yoshihito Tanaka, Takuya Yoshimura, Fumihiko Akahoshi, Yoshiharu Hayashi
  • Publication number: 20040106655
    Abstract: The present invention aims at providing compounds having therapeutic effects due to a DPP-IV inhibitory action, and satisfactory as pharmaceutical products.
    Type: Application
    Filed: February 10, 2003
    Publication date: June 3, 2004
    Inventors: Hiroshi Kitajima, Hiroshi Sakashita, Fumihiko Akahoshi, Yoshiharu Hayashi