Patents by Inventor Kazuo Umemura

Kazuo Umemura 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: 10456200
    Abstract: The position of a metal marker 5 relative to an optical fiber 6 is fixed, and the metal marker 5 can be moved up close to a target site such as a thrombus. It is preferable that the position, in an optical fiber longitudinal direction, of a front-end face of the optical fiber 6 is coincident with the position, in an optical fiber longitudinal direction, of a front-end face of the metal marker 5. More specifically, since the distance between the target site and the front end of the optical fiber 6 is known by radiography, it becomes unnecessary to use a large quantity of contrast agent and irradiate a laser beam depending on skill and intuition, and therefore an effective laser beam irradiation becomes possible.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: October 29, 2019
    Assignees: HAMAMATSU PHOTONICS K.K.
    Inventors: Hiroyuki Okada, Teiji Nakayama, Kazuo Umemura, Daisuke Yamashita, Yutaka Yamashita, Katsuhiro Kobayashi
  • Publication number: 20170218526
    Abstract: To provide an ion exchange membrane for alkali chloride electrolysis for which membrane strength is increased while membrane resistance is reduced to reduce electrolysis voltage during alkali chloride electrolysis and which prevents peeling between layers (S) and a layer (C). The ion exchange membrane for alkali chloride electrolysis comprises a layer (C) which comprises a fluorinated polymer having carboxylic acid functional groups, at least two layers (S) which comprise a fluorinated polymer having sulfonic acid functional groups, and a reinforcing material, wherein the layers (S) include a layer (Sa) and a layer (Sb), the layer (Sa) is a layer which is adjacent to the layer (C), the layer (Sb) is a layer which is not adjacent to the layer (C), the reinforcing material is disposed in the layer (Sb) substantially in parallel to the layer (Sb) in a state not in contact with the layer (Sa), and the ion exchange capacity of the layer (Sa) is lower than the ion exchange capacity of the layer (Sb).
    Type: Application
    Filed: April 19, 2017
    Publication date: August 3, 2017
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yasushi YAMAKI, Takayuki KANEKO, Hiromitsu KUSANO, Takuo NISHIO, Kazuo UMEMURA
  • Patent number: 9682370
    Abstract: Provided is a process for producing a fluorinated copolymer which is capable of providing an ion exchange membrane which can suppress a decrease in current efficiency by impurities in an aqueous alkali chloride solution as a raw material on electrolysis of the alkali chloride aqueous solution. Also provided is a process for producing a fluorinated copolymer that comprises washing a fluorinated copolymer comprising a fluorinated monomer having a carboxylic acid type functional group and a fluorinated olefin, with a washing solvent containing a fluorinated solvent at a temperature of at least 40° C. and at most a boiling point of the washing solvent.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: June 20, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Shintaro Fukunaga, Yukiko Hattori, Kazuo Umemura, Shigeru Aida, Atsushi Tsuji, Toshinori Tomita
  • Patent number: 9624329
    Abstract: A process for producing a fluorinated copolymer includes polymerizing a fluorinated monomer having a carboxylic acid functional group or a sulfonic acid functional group and a fluorinated olefin by a solution polymerization method in a polymerization medium to obtain a mixture containing a fluorinated copolymer, an unreacted monomer and the polymerization medium. The mixture is continuously or intermittently transferred to an evaporation vessel provided with a stirrer and heating the mixture with stirring in the evaporation vessel to evaporate and recover the unreacted monomer and the polymerization medium.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: April 18, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeru Aida, Toshinori Tomita, Toshinori Eto, Kazuo Umemura, Atsushi Tsuji
  • Patent number: 9604180
    Abstract: To provide a fluorinated copolymer which is capable of providing an ion exchange membrane having little adverse effect due to impurities in an alkali chloride aqueous solution on electrolysis of the alkali chloride aqueous solution. To use a fluorinated copolymer of a fluorinated monomer having a carboxylic acid type functional group with a fluorinated olefin, wherein the proportion of components having a common logarithm (log M) of a molecular weight M being from 2.0 to 3.5 is at most 10 mass % per 100 mass % of components having a common logarithm (log M) of a molecular weight M being at least 2.0, contained in a CClF2CF2CClFH soluble content.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: March 28, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Yukiko Hattori, Shintaro Fukunaga, Kazuo Umemura, Shigeru Aida, Atsushi Tsuji, Toshinori Tomita
  • Patent number: 9448234
    Abstract: A method for diagnosing a risk for preterm delivery or miscarriage in a pregnant woman and preventing preterm delivery or miscarriage in the pregnant woman who has been determined to have the risk is provided. The method includes measuring plasminogen activator inhibitor-1 activity or level in plasma isolated from a pregnant woman. The method also includes determining that the pregnant woman has a risk for preterm delivery or miscarriage when the activity or the level is lower than that in the plasma of a normal pregnant woman. The method also includes administering plasminogen activator inhibitor-1 to the pregnant woman who has been determined to have the risk. A kit for the diagnosis of the degree of risk for preterm delivery or miscarriage also is provided. A pharmaceutical composition for the prevention of preterm delivery or miscarriage, comprising plasminogen activator inhibitor-1, also is provided.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 20, 2016
    Assignee: NATIONAL UNIVERSITY CORPORATION HAMAMATSU UNIVERSITY SCHOOL OF MEDICINE
    Inventors: Naohiro Kanayama, Kazuo Umemura, Takayuki Iwaki, Tetsumei Urano, Kotomi Ikuma
  • Publication number: 20160238935
    Abstract: To provide a coating composition which exhibits excellent followability to a difference in level in its application, and which is capable of forming a coating layer having a low refractive index in a short-wavelength region and exhibiting excellent solubility to an alkaline aqueous solution. A coating composition comprising a solvent and a fluorinated polymer (A) which has a unit represented by —[CX1X2—CY(—Rf—COOM)]— and has a number average molecular weight of from 1,000 to 7,500. X1 and X2 are each independently a hydrogen atom, a fluorine atom or a chlorine atom; Y is a hydrogen atom, a fluorine atom, a chlorine atom, a methyl group or a trifluoromethyl group; Rf is a branched perfluoroalkylene group which may contain an etheric oxygen atom between carbon-carbon atoms, or a branched oxyperfluoroalkylene group which may contain an etheric oxygen atom between carbon-carbon atoms; and M is a hydrogen atom or an ammonium ion which may be substituted.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 18, 2016
    Applicant: Asahi Glass Company, Limited
    Inventors: Ryujiro YAMASAKI, Akihiko ASAKAWA, Yoshihiko SAKANE, Masakuni SATO, Kazuo UMEMURA
  • Patent number: 9297811
    Abstract: Disclosed is the construction of a system capable of quickly and easily identifying patients having a risk for worsening inflammatory digestive tract disease by identifying a causal factor for the worsening of the inflammatory digestive tract disease. Specifically disclosed is a method for detecting oral bacteria that cause worsening of inflammatory digestive tract disease and/or a screening that targets high risk for worsening of inflammatory digestive tract disease and/or determining the risk for worsening of the inflammatory digestive tract disease by PA not being detected and/or CBP being detected, inclusive of the detection of PA, which is an oral bacteria protein antigen, and/or CBP, which is collagen binding protein, in samples. Also disclosed are a detection reagent and kit used for this method.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: March 29, 2016
    Assignees: National University Corporation Hamamatsu University School of Medicine, Osaka University
    Inventors: Kazuo Umemura, Kazuya Hokamura, Kazuhiko Nakano, Takashi Ooshima, Ryota Nomura, Koichiro Wada
  • Publication number: 20140315227
    Abstract: The present invention relates to a method for diagnosing the degree of risk for preterm delivery or miscarriage, comprising measuring plasminogen activator inhibitor activity or level in plasma. Specifically, the present invention relates to: a method for diagnosing the degree of risk for preterm delivery or miscarriage, wherein when the plasminogen activator inhibitor activity or level is lower than those of normal pregnant woman, the degree of risk for preterm delivery or miscarriage is determined to be high; a kit for the diagnosis of the degree of risk for preterm delivery or miscarriage; and a pharmaceutical composition for the prevention of preterm delivery or miscarriage, comprising plasminogen activator inhibitor-1.
    Type: Application
    Filed: November 15, 2012
    Publication date: October 23, 2014
    Inventors: Naohiro Kanayama, Kazuo Umemura, Takayuki Iwaki, Tetsumei Urano, Kotomi Ikuma
  • Publication number: 20140100344
    Abstract: To provide a process by which from a mixture containing a fluorinated copolymer, an unreacted monomer and a polymerization medium, the unreacted monomer and the polymerization medium can efficiently be recovered. A process for producing a fluorinated copolymer, which comprises (I) a step of polymerizing a fluorinated monomer having a carboxylic acid functional group or a sulfonic acid functional group and a fluorinated olefin in a polymerization medium to obtain a mixture containing a fluorinated copolymer, an unreacted monomer and the polymerization medium, and (II) a step of continuously or intermittently transferring the mixture to an evaporation vessel provided with a stirrer and heating it with stirring in the evaporation vessel to evaporate and recover the unreacted monomer and the polymerization medium.
    Type: Application
    Filed: December 6, 2013
    Publication date: April 10, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shigeru AIDA, Toshinori Tomita, Toshinori Eto, Kazuo Umemura, Atsushi Tsuji
  • Publication number: 20140080930
    Abstract: To provide a process for producing a fluorinated copolymer which is capable of providing an ion exchange membrane which can suppress a decrease in current efficiency by impurities in an aqueous alkali chloride solution as a raw material on e.g. electrolysis of the alkali chloride aqueous solution. A process for producing a fluorinated copolymer, which comprises a step of washing a fluorinated copolymer of a fluorinated monomer having a carboxylic acid type functional group with a fluorinated olefin, by a washing solvent containing a fluorinated solvent, at a temperature of at least 40° C. and at most a boiling point of the washing solvent.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 20, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shintaro FUKUNAGA, Yukiko HATTORI, Kazuo UMEMURA, Shigeru AIDA, Atsushi TSUJI, Toshinori TOMITA
  • Publication number: 20140073709
    Abstract: To provide a fluorinated copolymer which is capable of providing an ion exchange membrane having little adverse effect due to impurities in an alkali chloride aqueous solution on electrolysis of the alkali chloride aqueous solution. To use a fluorinated copolymer of a fluorinated monomer having a carboxylic acid type functional group with a fluorinated olefin, wherein the proportion of components having a common logarithm (log M) of a molecular weight M being from 2.0 to 3.5 is at most 10 mass % per 100 mass % of components having a common logarithm (log M) of a molecular weight M being at least 2.0, contained in a CClF2CF2CClFH soluble content.
    Type: Application
    Filed: November 18, 2013
    Publication date: March 13, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yukiko Hattori, Shintaro Fukunaga, Kazuo Umemura, Shigeru Aida, Atsushi Tsuji, Toshinori Tomita
  • Patent number: 8394865
    Abstract: To provide an ion exchange membrane for alkaline chloride electrolysis having a low electric resistance and further having a sufficient mechanical strength. To employ an ion exchange membrane containing a polymer having units (U1). Q1, Q2=a perfluoroalkylene group or the like; Rf1, Rf2=a perfluoroalkyl group or the like; X1=an oxygen atom or the like; a=0 or the like; Y1=a fluorine atom or the like; r=0 or 1; and M=a hydrogen atom or an alkali metal atom.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: March 12, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Kazuo Umemura, Hiromitsu Kusano, Tetsuji Shimohira, Susumu Saito
  • Publication number: 20130059328
    Abstract: Disclosed is the construction of a system capable of quickly and easily identifying patients having a risk for worsening inflammatory digestive tract disease by identifying a causal factor for the worsening of the inflammatory digestive tract disease. Specifically disclosed is a method for detecting oral bacteria that cause worsening of inflammatory digestive tract disease and/or a screening that targets high risk for worsening of inflammatory digestive tract disease and/or determining the risk for worsening of the inflammatory digestive tract disease by PA not being detected and/or CBP being detected, inclusive of the detection of PA, which is an oral bacteria protein antigen, and/or CBP, which is collagen binding protein, in samples. Also disclosed are a detection reagent and kit used for this method.
    Type: Application
    Filed: March 10, 2011
    Publication date: March 7, 2013
    Applicant: Osaka University
    Inventors: Kazuo Umemura, Kazuya Hokamura, Kazuhiko Nakano, Takashi Ooshima, Ryota Nomura, Koichiro Wada
  • Patent number: 8377998
    Abstract: A polymerization medium having small ozone depletion potential and small global warming potential and having a small chain transfer constant is used, to efficiently produce a fluoropolymer having a high molecular weight and having excellent heat resistance, solvent resistance, chemical resistance, etc. A process for producing a fluoropolymer, which comprises polymerizing a fluoromonomer having a carboxylic acid type functional group and a fluoroolefin using a hydrofluorocarbon as a medium, wherein the hydrofluorocarbon as the medium has 4 to 10 carbon atoms and has a ratio (molar basis) of the number of hydrogen atoms/the number of fluorine atoms (H/F ratio) of from 0.05 to 20.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: February 19, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Toshinori Tomita, Jumpei Nomura, Junji Saito, Yasuhiko Matsuoka, Kazuo Umemura
  • Patent number: 8349155
    Abstract: A cation exchange membrane which shows suppressed deterioration of the strength of the membrane in the upper portion of an electrolytic cell when the membrane is employed in the electrolytic cell and used for a long term, which can perform electrolysis with good production efficiency, and which can be produced simply with low cost; its production process and; such an electrolytic cell; are provided.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: January 8, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Kazuo Umemura, Hiromitsu Kusano
  • Publication number: 20120028879
    Abstract: Provided is a method that involves the detection of protein antigen (PA) and/or collagen-binding protein (CBP) of oral cavity bacteria in a sample, and in which oral cavity bacteria that exacerbate hemolysis are detected for and/or subjects at high-risk for hemolysis aggravation are screened anchor the level of risk of the hemolysis aggravation in a subject is assessed if a PA is not detected anchor a CBP is detected in the sample. Also provided are a detection reagent and kit for use in the method.
    Type: Application
    Filed: March 15, 2010
    Publication date: February 2, 2012
    Applicant: NATIONAL UNIVERSITY CORPORATION HAMAMATSU UNIVERSITY SCHOOL OF MEDICINE
    Inventors: Kazuo Umemura, Kazuya Hokamura, Kazuhiko Nakano, Takashi Ooshima, Ryota Nomura, Koichiro Wada
  • Publication number: 20110278159
    Abstract: A cation exchange membrane which shows suppressed deterioration of the strength of the membrane in the upper portion of an electrolytic cell when the membrane is employed in the electrolytic cell and used for a long term, which can perform electrolysis with good production efficiency, and which can be produced simply with low cost; its production process and; such an electrolytic cell; are provided.
    Type: Application
    Filed: July 28, 2011
    Publication date: November 17, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kazuo UMEMURA, Hiromitsu Kusano
  • Publication number: 20110015283
    Abstract: A polymerization medium having small ozone depletion potential and small global warming potential and having a small chain transfer constant is used, to efficiently produce a fluoropolymer having a high molecular weight and having excellent heat resistance, solvent resistance, chemical resistance, etc. A process for producing a fluoropolymer, which comprises polymerizing a fluoromonomer having a carboxylic acid type functional group and a fluoroolefin using a hydrofluorocarbon as a medium, wherein the hydrofluorocarbon as the medium has 4 to 10 carbon atoms and has a ratio (molar basis) of the number of hydrogen atoms/the number of fluorine atoms (H/F ratio) of from 0.05 to 20.
    Type: Application
    Filed: September 29, 2010
    Publication date: January 20, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Toshinori TOMITA, Jumpei Nomura, Junji Saito, Yasuhiko Matsuoka, Kazuo Umemura
  • Publication number: 20090306233
    Abstract: To provide an ion exchange membrane for alkaline chloride electrolysis having a low electric resistance and further having a sufficient mechanical strength. To employ an ion exchange membrane containing a polymer having units (U1). Q1, Q2=a perfluoroalkylene group or the like; Rf1, Rf2=a perfluoroalkyl group or the like; X1=an oxygen atom or the like; a=0 or the like; Y1=a fluorine atom or the like; r=0 or 1; and M=a hydrogen atom or an alkali metal atom.
    Type: Application
    Filed: July 16, 2009
    Publication date: December 10, 2009
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kazuo UMEMURA, Hiromitsu KUSANO, Tetsuji SHIMOHIRA, Susumu SAITO