Patents by Inventor Masami Ohtsuka

Masami Ohtsuka 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: 8785438
    Abstract: A compound represented by formula (I) having mTOR inhibitory activity or a pharmacologically acceptable salt thereof.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: July 22, 2014
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Masami Ohtsuka, Noriyasu Haginoya, Masanori Ichikawa, Hironori Matsunaga, Hironao Saito, Yoshihiro Shibata, Tomoyuki Tsunemi
  • Patent number: 8436012
    Abstract: A compound represented by formula (I) having mTOR inhibitory activity or a pharmacologically acceptable salt thereof.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: May 7, 2013
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Masami Ohtsuka, Noriyasu Haginoya, Masanori Ichikawa, Hironori Matsunaga, Hironao Saito, Yoshihiro Shibata, Tomoyuki Tsunemi
  • Patent number: 8431614
    Abstract: There is provided a novel loxoprofen derivative that has no side effect such as a gastrointestinal disorder and also has excellent anti-inflammatory and analgesic effects and is represented by the following formula (I) or (II): (wherein R1 and R2 each represent a halogen atom or a substituted or unsubstituted phenyl group) or a pharmacologically acceptable salt thereof. In the derivative, the halogen atom is selected from a chlorine atom, a bromine atom, a fluorine atom, and an iodine atom, and a substituent of the substituted phenyl group is a halogen atom, a hydroxyl group, a substituted or unsubstituted lower alkyl group, a lower alkylthio group, a lower alkoxy group, a nitro group, an amino group, or a carboxyl group.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: April 30, 2013
    Assignees: LTT Bio-Pharma Co., Ltd., National University Corporation Kumamoto University
    Inventors: Toru Mizushima, Masami Ohtsuka, Yoshinari Okamoto, Naoki Yamakawa
  • Publication number: 20120016158
    Abstract: There is provided a novel loxoprofen derivative that has no side effect such as a gastrointestinal disorder and also has excellent anti-inflammatory and analgesic effects and is represented by the following formula (I) or (II): (wherein R1 and R2 each represent a halogen atom or a substituted or unsubstituted phenyl group) or a pharmacologically acceptable salt thereof. In the derivative, the halogen atom is selected from a chlorine atom, a bromine atom, a fluorine atom, and an iodine atom, and a substituent of the substituted phenyl group is a halogen atom, a hydroxyl group, a substituted or unsubstituted lower alkyl group, a lower alkylthio group, a lower alkoxy group, a nitro group, an amino group, or a carboxyl group.
    Type: Application
    Filed: February 18, 2010
    Publication date: January 19, 2012
    Applicants: LTT BIO-PHARMA CO., LTD., National University Corporation, Kumamoto University
    Inventors: Toru Mizushima, Masami Ohtsuka, Yoshinari Okamoto, Naoki Yamakawa
  • Publication number: 20110262548
    Abstract: A PGE1 derivative is provided which has an excellent sustained, slow-release PGE1 action. In addition, a PGE1-derivative-containing nanoparticle produced using this PGE1 derivative is provided, which effectively targets an affected site, has excellent drug slow-release properties, and has reduced side effects. This PGE1-derivative-containing nanoparticle is a nanoparticle containing a prostaglandin E1 derivative represented by the following formula (1) (wherein n denotes an integer of 1 to 12), obtained by hydrophobicizing the prostaglandin E1 derivative with a metal ion, and reacting the hydrophobicized prostaglandin E1 derivative with poly L-lactic acid or a poly(L-lactic acid/glycolic acid) copolymer and a poly DL- or L-lactic acid-polyethylene glycol block copolymer or a poly(DL- or L-lactic acid/glycolic acid)-polyethylene glycol block copolymer.
    Type: Application
    Filed: October 16, 2009
    Publication date: October 27, 2011
    Applicant: LTT Bio-Pharma Co., Ltd.
    Inventors: Toru Mizushima, Masami Ohtsuka, Yoshinari Okamoto
  • Publication number: 20110082138
    Abstract: A compound represented by formula (I) having mTOR inhibitory activity or a pharmacologically acceptable salt thereof.
    Type: Application
    Filed: November 24, 2010
    Publication date: April 7, 2011
    Applicant: Daiichi Sankyo Company, Limited
    Inventors: Masami Ohtsuka, Noriyasu Haginoya, Masanori Ichikawa, Hironori Matsunaga, Hironao Saito, Yoshihiro Shibata, Tomoyuki Tsunemi
  • Patent number: 7056917
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): wherein, R1 and R2 represent hydrogen atom, a halogen atom, hydroxyl group or the like, W1 represents —CH?CH—, —CH2O—, —CH2CH2— or the like; R3 represents hydrogen atom, a halogen atom, hydroxyl group or an amino group; R4 represents hydrogen atom, a group of —OZ0-4R5 (Z0-4 represents an alkylene group, a fluorine-substituted alkylene group or a single bond, and R5 represents a cyclic alkyl group, an aryl group or the like); W2 represents a single bond or —C(R8)?C(R9)— (R8 and R9 represent hydrogen atom, a halogen atom, a lower alkyl group or the like, Q represents an acidic group, but W2 and Q may together form vinylidenethiazolidinedione or an equivalent heterocyclic ring; m and n represent an integer of 0 to 2, and q represents an integer of 0 to 3.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: June 6, 2006
    Assignees: Daiichi Pharmaceutical Co., Ltd., Trine Pharmaceuticals, Inc.
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, William Watkins, Jason Zhang, Monica Palme, Aesop Cho
  • Publication number: 20060106034
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): wherein, R1 and R2 represent hydrogen atom, a halogen atom, hydroxyl group or the like, W1 represents —CH?CH—, —CH2O—, —CH2CH2— or the like; R3 represents hydrogen atom, a halogen atom, hydroxyl group or an amino group; R4 represents hydrogen atom, a group of —OZ0-4R5 (Z0-4 represents an alkylene group, a fluorine-substituted alkylene group or a single bond, and R5 represents a cyclic alkyl group, an aryl group or the like); W2 represents a single bond or —C(R8)?C(R9)?(R8 and R9 represent hydrogen atom, a halogen atom, a lower alkyl group or the like, Q represents an acidic group, but W2 and Q may together form vinylidenethiazolidinedione or an equivalent heterocyclic ring; m and n represent an integer of 0 to 2, and q represents an integer of 0 to 3.
    Type: Application
    Filed: December 29, 2005
    Publication date: May 18, 2006
    Applicants: Daiichi Pharmaceutical Co., Ltd., Trine Pharmaceuticals, Inc.
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, William Watkins, Jason Zhang, Monica Palme, Aesop Cho
  • Publication number: 20050009843
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): wherein, R1 and R2 represent hydrogen atom, a halogen atom, hydroxyl group or the like, W1 represents —CH?CH—, —CH2O—, —CH2CH2— or the like; R3 represents hydrogen atom, a halogen atom, hydroxyl group or an amino group; R4 represents hydrogen atom, a group of —OZ0-4R5 (Z0-4 represents an alkylene group, a fluorine-substituted alkylene group or a single bond, and R5 represents a cyclic alkyl group, an aryl group or the like); W2 represents a single bond or —C(R8)?C(R9)—(R8 and R9 represent hydrogen atom, a halogen atom, a lower alkyl group or the like, Q represents an acidic group, but W2 and Q may together form vinylidenethiazolidinedione or an equivalent heterocyclic ring; m and n represent an integer of 0 to 2, and q represents an integer of 0 to 3.
    Type: Application
    Filed: April 24, 2002
    Publication date: January 13, 2005
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, Ryo Okumura, Kazuki Hoshino, William Watkins, Jason Zhang, Monica Palme, Aesop Cho
  • Publication number: 20030092720
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): 1
    Type: Application
    Filed: April 26, 2001
    Publication date: May 15, 2003
    Applicant: DAIICHI PHARMACEUTICAL CO., LTD
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, William Watkins, Jason Zhang, Monica Palme, Aesop Cho
  • Patent number: 6399629
    Abstract: Compounds are described which have efflux pump inhibitor activity. Also described are methods of using such efflux pump inhibitor compounds and pharmaceutical compositions which include such compounds.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: June 4, 2002
    Assignee: Microcide Pharmaceuticals, Inc.
    Inventors: Suzanne Chamberland, Yohei Ishida, Ving J Lee, Roger Leger, Kiyoshi Nakayama, Toshiharu Ohta, Masami Ohtsuka, Thomas E. Renau, William J. Watkins, Zhijia J. Zhang