Patents by Inventor Izumi Saitoh

Izumi Saitoh 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: 9221823
    Abstract: Novel crystals of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction having main peaks at diffraction angles (2?) of about 6.62, 13.04, 15.44, 16.58, 17.64, 20.88, 23.26, 25.02 and 25.52 (degrees) are provided.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: December 29, 2015
    Assignee: SHIONOGI & CO., LTD.
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Publication number: 20150031664
    Abstract: Novel crystals of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction having main peaks at diffraction angles (2?) of about 6.62, 13.04, 15.44, 16.58, 17.64, 20.88, 23.26, 25.02 and 25.52 (degrees) are provided.
    Type: Application
    Filed: February 21, 2014
    Publication date: January 29, 2015
    Applicant: SHIONOGI & CO., LTD.
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Publication number: 20130059831
    Abstract: Novel crystals of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction having main peaks at diffraction angles (2?) of about 6.62, 13.04, 15.44, 16.58, 17.64, 20.88, 23.26, 25.02 and 25.52 (degrees) are provided.
    Type: Application
    Filed: August 14, 2012
    Publication date: March 7, 2013
    Applicant: SHIONOGI & CO., LTD.
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Patent number: 8247402
    Abstract: Novel crystals of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)p yrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction having main peaks at diffraction angles (2?) of about 13.04, 14.98, 15.88, 16.62, 20.62, 21.06, 22.18, 23.90, 26.08, 28.22 and 28.98 (degrees) and a crystal of said compound having a diffraction pattern in powder X-ray diffraction having main peaks at diffraction angles (2?) of about 6.62, 13.04, 15.44, 16.58, 17.64, 20.88, 23.26, 25.02 and 25.52 (degrees) are provided.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: August 21, 2012
    Assignee: Shiongi & Co., Ltd.
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Publication number: 20080207586
    Abstract: A novel crystal of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction preferably having main peaks at diffraction angles (2?)=13.04, 14.98, 15.88, 16.62, 20.62, 21.06, 22.18, 23.90, 26.08, 28.22 and 28.98 (degrees) is provided.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 28, 2008
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Publication number: 20070060562
    Abstract: A novel crystal of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3 [[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction preferably having main peaks at diffraction angles (2?)=13.04, 14.98, 15.88, 16.62, 20.62, 21.06, 22.18, 23.90, 26.08, 28.22 and 28.98 (degrees) is provided.
    Type: Application
    Filed: November 10, 2006
    Publication date: March 15, 2007
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Publication number: 20030153191
    Abstract: A novel crystal of a pyrrolidylthiocarbapenem derivative having excellent stability is provided. According to the present invention, a crystal of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3 [[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid having a diffraction pattern in powder X-ray diffraction preferably having main peaks at diffraction angles (2&thgr;)=13.04, 14.98, 15.88, 16.62, 20.62, 21.06, 22.18, 23.90, 26.08, 28.22 and 28.98 (degrees) is provided.
    Type: Application
    Filed: September 30, 2002
    Publication date: August 14, 2003
    Inventors: Izumi Saitoh, Masayuki Takahira, Toshio Kawakita, Yasuyuki Yoshioka
  • Patent number: 5346977
    Abstract: A method of applying a skin-protective composition which comprises an acrylic copolymer which comprises(A) 40 to 85% by weight of an alkyl acrylate,(B) 5 to 50% by weight of an alkyl methacrylate, and(C) 10 to 30% by weight of a mono-ethylenically unsaturated monomer having a carboxyl group, and a medium, which can effectively block irritative materials and be easily removed from a skin.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: September 13, 1994
    Assignees: Shionogi & Co., Ltd., Nissin Chemical Industry Co., Ltd.
    Inventors: Yoshio Sakai, Izumi Saitoh
  • Patent number: 5229435
    Abstract: A skin-protecting composition which comprises a silicone-acrylic copolymer which comprises(A) 1 to 15% by weight of a silicon-containing monomer,(B) 30 to 70% by weight of an alkyl acrylate,(C) 0 to 30% by weight of an alkyl methacrylate, and(D) 5 to 45% by weight of a mono-ethylenically unsaturated monomer having a carboxyl group,and a medium, which can effectively block irritative materials and be easily removed from a skin.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: July 20, 1993
    Assignees: Shionogi & Co., Ltd., Nissin Chemical Industry Co., Ltd.
    Inventors: Yoshio Sakai, Izumi Saitoh
  • Patent number: 5086077
    Abstract: A novel endermic medicament having a consistency of a gel is proposed which is formulated, as a gel base, with non-ionic water-soluble cellulose ether, e.g., methyl cellulose and hydroxypropyl methyl cellulose, modified with a modification agent containing, in the molecule, an alkyl group having 6 to 26 carbon atoms and a functional group having reactivity with the hydroxyl group in the cellulose ether, e.g., stearyl glycidyl ether, decyl glycidyl ether and cetyl epoxide. The endermic medicament formulated with the modified cellulose ether is stable by virtue of the very little interaction between the active ingredients and the gel base and also can exhibit high percutaneous absorptivity of the active ingredients through the human skin.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: February 4, 1992
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Sakae Obara, Hiroaki Muto, Sumiko Mizuno, Tohru Chiba, Izumi Saitoh, Kaori Ikeda
  • Patent number: 5063048
    Abstract: A UV light-absorbing skin-protecting composition which comprises an acrylic copolymer comprising (A) a compound of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group, X is a group of the formula: ##STR2## in which R.sup.2 is a hydroxy group, R.sup.3 is a hydrogen atom or hydroxy group, R.sup.4 and R.sup.5 are the same or different and each is a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, a carboxyl group, a sulfonic acid group or a sulfonamide group and R.sup.6 is a single bond or a methylene group,Y is --O--, --NH-- or a group of the formula: ##STR3## in which R.sup.7 is a hydrogen atom or a lower alkyl group, R.sup.8 is a hydrogen atom or a hydroxy group, and m and n are the same or different and is each 0 or 1, (B) 40 to 75% by weight of an alkyl acrylate, (C) 10 to 40% by weight of an alkyl methacrylate, and (D) 5 to 30% by weight of a monoethylenically unsaturated monomer having a carboxyl group; and a medium.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: November 5, 1991
    Assignees: Shionogi & Co., Ltd., Nisshin Chemical Industry Co., Ltd.
    Inventors: Izumi Saitoh, Yoshio Sasaki
  • Patent number: 4935241
    Abstract: A pharmaceutical preparation for the treatment of tinea pedis, containing as basic components about 0.1% to about 2.5% of croconazole hydrochloride and about 1%-15% of an ethyl acrylate-methyl methacrylate copolymer in an aqueous alcohol, and if necessary, about 0.1% to about 2.5% of a thickening agent and/or a plasticizer.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: June 19, 1990
    Assignee: Shionogi & Co., Ltd.
    Inventors: Izumi Saitoh, Kaori Ikeda, Shigeru Kido, Yoshio Doi, Shohei Egawa
  • Patent number: 4923893
    Abstract: External preparations consisting essentially of about 0.1% to about 5% of tocopherol acetate and/or about 0.05% to about 0.3% of glycyrrhetinic acid, about 1% to about 15% of a methacrylic acid-ethyl acrylate copolymer, and about 0.2% to about 3% of a thickening agent in an alcoholic solvent, wherein said copolymer is characterized by that the monomer ratio of ethyl acrylate to methacrylic acid is within a range from 75/25 to 95/5, with residual monomer being 50 ppm or less and with practically no surfactants.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: May 8, 1990
    Assignee: Shionogi & Co., Ltd.
    Inventors: Izumi Saitoh, Shigeru Kido, Yoshio Doi, Shohei Egawa
  • Patent number: 4915940
    Abstract: Film-formation-type antifungal preparations for external application, consisting essentially of about 0.1% to about 1.5% of tolnaphtate, about 10% to about 20% of a dimethylaminoethyl methacrylate-methacrylic acid ester copolymer and 0.5% to about 10% of a medium chain fatty acid ester in an alcoholic solvent but containing practically no water.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: April 10, 1990
    Assignee: Shionogi & Co., Ltd.
    Inventors: Izumi Saitoh, Kaori Ikeda, Yoshio Doi, Shohei Egawa
  • Patent number: 4914140
    Abstract: An acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is in a range between 75:25 and 95:5, containing therein a residual monomer content of 50 ppm or less, but substantially no surfactants, and which is useful as agents for protecting the skin and manufactured from the following essential components:a. an acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is in a range between 75:25 and 95:5, containing therein residual monomers in an amount of 50 ppm or less, but substantially no surfactants--approximately 2 to 10%;b. cellulose derivative--approximately 0.2 to 2%; andc. a necessary amount of an aqueous alcohol to make the whole 100%.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: April 3, 1990
    Assignees: Shinonogi and Co., Ltd., Nisshin Chemical Co., Ltd.
    Inventors: Izumi Saitoh, Shigeru Kido, Yoshio Sasaki, Syuichiro Shinohara
  • Patent number: 4874830
    Abstract: An acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is in a range between 75:25 and 95:5, containing therein a residual monomer content of 50 ppm or less, but substantially no surfactants, and which is useful as agents for protecting the skin and manufactured from the following essential components:a. an acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is in a range between 75:25 and 95:5, containing therein the residual monomers in an amount of 50 ppm or less, but substantially no surfactants . . . approximately 2 to 10%;b. cellulose derivative . . . approximately 0.2 to 2%; andc. a necessary amount of an aqueous alcohol to make the whole 100%.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: October 17, 1989
    Assignees: Shionogi & Co., Ltd., Nisshin Chemical Co., Ltd.
    Inventors: Izumi Saitoh, Shigeru Kido, Yoshio Sasaki, Syuichiro Shinohara
  • Patent number: 4775667
    Abstract: Topical analgesic anti-inflammatory compositions containing a corticosteroid in addition to the conventional efficacy-proven ingredients are disclosed. They may be embodied in an aerosol, a solution and any other type of composition being convenient for administration. More than the sum of effects of the individual ingredients has been proved. In other words, the effects of the salicylate esters and L-menthol are synergistically enhanced by the addition of the corticosteroid. Particularly, the persistency of the analgesic/anti-inflammatory effects of the conventional ingredients has been proved to be dependent upon the the concentration of the corticosteroid in the composition.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: October 4, 1988
    Assignee: Shionogi & Co., Ltd.
    Inventors: Izumi Saitoh, Hirokuni Jyoyama, Fujio Asanuma, Katsumi Hirose, Shohei Egawa