Patents by Inventor Michito Sumikawa

Michito Sumikawa 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).

  • Publication number: 20200229955
    Abstract: A stent 51c is formed by braiding a plurality of filament threads containing a biodegradable polymer into a cylindrical braid, and connecting points 53a-53d at end portions of the filament threads constituting the braid are arranged in two or more rows in a length direction of the braid. Elastic threads 54a-54d are each disposed outside at least a part of the stent 51c and along at least a part of the stent in the length direction including the vicinity of either one of end portions of the stent. One end of each elastic thread is fixed to the vicinity of the end portion of the stent, and the other end is fixed to any portion of the stent. In a state in which the stent is radially contracted, tension may be applied to the elastic threads. Thus, provided are a stent that is easy to load into a delivery system and also facilitates the expanding operation, as well as a medical device including the stent.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 23, 2020
    Inventors: Shoji UESUGI, Toshiki SAOTOME, Atsushi KINUGASA, Michito SUMIKAWA, Noriko IIJIMA
  • Patent number: 9029333
    Abstract: The present invention provides a glucose decomposition-suppressed solid preparation for dialysis among powdery or granular preparations for dialysis containing acetate-free solid organic acids as pH adjusting agents. The present invention provides the solid preparation for dialysis containing electrolytes, glucose and pH adjusting agents characterized in that solid organic acids containing reduced amount of microparticles are used, and more specifically, characterized in that solid organic acids whose 20 or less percent of particles are 250 ?m or less in diameter, or solid organic acids whose 10 or less percent of particles are 150 ?m or less in diameter, are used. Preferably, the solid organic acid contained therein is citric acid.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: May 12, 2015
    Assignee: Advanced Renal Technologies, Inc.
    Inventors: Yoshihiro Sugiyama, Yuichi Iwai, Michito Sumikawa, Naotaka Kuroda
  • Patent number: 7977507
    Abstract: Nateglinide M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: July 12, 2011
    Assignee: Ajinomoto Co., Inc.
    Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
  • Publication number: 20110092733
    Abstract: Nateglinide M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble.
    Type: Application
    Filed: December 15, 2010
    Publication date: April 21, 2011
    Applicant: Ajinomoto Co., Inc.
    Inventors: Yoshihito KOGUCHI, Tomoko NAKAO, Michito SUMIKAWA
  • Patent number: 7888531
    Abstract: Nateglinide M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: February 15, 2011
    Assignee: Ajinomoto Co., Inc.
    Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
  • Publication number: 20100120702
    Abstract: The present invention provides a glucose decomposition-suppressed solid preparation for dialysis among powdery or granular preparations for dialysis containing acetate-free solid organic acids as pH adjusting agents. The present invention provides the solid preparation for dialysis containing electrolytes, glucose and pH adjusting agents characterized in that solid organic acids containing reduced amount of microparticles are used, and more specifically, characterized in that solid organic acids whose 20 or less percent of particles are 250 ?m or less in diameter, or solid organic acids whose 10 or less percent of particles are 150 ?m or less in diameter, are used. Preferably, the solid organic acid contained therein is citric acid.
    Type: Application
    Filed: November 24, 2009
    Publication date: May 13, 2010
    Applicant: Ajinomoto Co., Inc.
    Inventors: Yoshihiro Sugiyama, Yuichi Iwai, Michito Sumikawa, Naotaka Kuroda
  • Patent number: 7659428
    Abstract: There is provided a method for producing easily highly-purified acylphenylalanine that is useful as a raw material of pharmaceutical products and the like, which comprises the step of reacting an acid chloride with phenylalanine in a mixed solvent of an organic solvent and water, while keeping the solvent under the alkali condition by using potassium hydroxide.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: February 9, 2010
    Assignee: Ajinomoto Co., Inc.
    Inventors: Michito Sumikawa, Takao Ohgane
  • Publication number: 20090253933
    Abstract: Nateglinide M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble.
    Type: Application
    Filed: June 16, 2009
    Publication date: October 8, 2009
    Applicant: Ajinomoto Co., Inc.
    Inventors: Yoshihito KOGUCHI, Tomoko Nakao, Michito Sumikawa
  • Patent number: 7586001
    Abstract: New nateglinide crystals, i. e. nateglinide A-type crystals (main peaks in powder X-ray diffraction: 4.4°, 5.2°, 15.7°, 18.5° (2?)), M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) and P-type crystals (main peaks in powder X-ray diffraction: 4.8°, 5.3°, 14.3°, 15.2° (2?)), can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble or, alternatively, by dissolving nateglinide in a mixed solvent composed of a solvent in which nateglinide is highly soluble and another solvent in which it is difficultly soluble, cooling the nateglinide solution to form crystals, filtering the mixture and drying the crystals at a specified temperature.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: September 8, 2009
    Assignee: Ajinomoto Co., Inc.
    Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
  • Patent number: 7544834
    Abstract: A method for producing B-type crystals of nateglinide substantially free of H-type crystals is provided, which comprises drying solvated wet crystals of nateglinide at a low temperature until no solvent remains and making a crystal conversion thereof. According to this method, B-type crystals of nateglinide can be produced at an industrial scale without allowing other forms of the crystalline polymorphism to coexist.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: June 9, 2009
    Assignee: Ajinomoto Co., Inc.
    Inventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
  • Publication number: 20080194867
    Abstract: New nateglinide crystals, i.e. nateglinide A-type crystals (main peaks in powder X-ray diffraction: 4.4°, 5.2°, 15.7°, 18.5° (2?)), M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2?)) and P-type crystals (main peaks in powder X-ray diffraction: 4.8°, 5.3°, 14.3°, 15.2° (2?)), can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble or, alternatively, by dissolving nateglinide in a mixed solvent composed of a solvent in which nateglinide is highly soluble and another solvent in which it is difficultly soluble, cooling the nateglinide solution to form crystals, filtering the mixture and drying the crystals at a specified temperature.
    Type: Application
    Filed: April 4, 2008
    Publication date: August 14, 2008
    Applicant: Ajinomoto Co., Inc.
    Inventors: Yoshihito KOGUCHI, Tomoko NAKAO, Michito SUMIKAWA
  • Patent number: 7411089
    Abstract: New nateglinide crystals, i.e. nateglinide A-type crystals (main peaks in powder X-ray diffraction: 4.4°, 5.2°, 15.7°, 18.5°(2?)), M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8°(2?)) and P-type crystals (main peaks in powder X-ray diffraction: 4.8°, 5.3°, 14.3°, 15.2°(2?)), can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble or, alternatively, by dissolving nateglinide in a mixed solvent composed of a solvent in which nateglinide is highly soluble and another solvent in which it is difficultly soluble, cooling the nateglinide solution to form crystals, filtering the mixture and drying the crystals at a specified temperature.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: August 12, 2008
    Assignee: Ajinomoto Co., Inc.
    Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
  • Publication number: 20070232829
    Abstract: A method for producing B-type crystals of nateglinide substantially free of H-type crystals is provided, which comprises drying solvated wet crystals of nateglinide at a low temperature until no solvent remains and making a crystal conversion thereof. According to this method, B-type crystals of nateglinide can be produced at an industrial scale without allowing other forms of the crystalline polymorphism to coexist.
    Type: Application
    Filed: June 4, 2007
    Publication date: October 4, 2007
    Applicant: AJINOMOTO CO. INC
    Inventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
  • Publication number: 20060155143
    Abstract: There is provided a method for producing easily highly-purified acylphenylalanine that is useful as a raw material of pharmaceutical products and the like, which comprises the step of reacting an acid chloride with phenylalanine in a mixed solvent of an organic solvent and water, while keeping the solvent under the alkali condition by using potassium hydroxide.
    Type: Application
    Filed: December 28, 2005
    Publication date: July 13, 2006
    Applicant: AJINOMOTO CO. INC
    Inventors: Michito Sumikawa, Takao Ohgane
  • Patent number: 7030268
    Abstract: There is provided a method for producing easily highly-purified acylphenylalanine that is useful as a raw material of pharmaceutical products and the like, which comprises the step of reacting an acid chloride with phenylalanine in a mixed solvent of an organic solvent and water, while keeping the solvent under the alkali condition by using potassium hydroxide.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Ajinomoto Co., Inc.
    Inventors: Michito Sumikawa, Takao Ohgane
  • Publication number: 20050101672
    Abstract: New nateglinide crystals, i.e. nateglinide A-type crystals (main peaks in powder X-ray diffraction: 4.4°, 5.2°, 15.7°, 18.5°(2?)), M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8°(2?)) and P-type crystals (main peaks in powder X-ray diffraction: 4.8°, 5.3°, 14.3°, 15.2°(2?)), can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble or, alternatively, by dissolving nateglinide in a mixed solvent composed of a solvent in which nateglinide is highly soluble and another solvent in which it is difficultly soluble, cooling the nateglinide solution to form crystals, filtering the mixture and drying the crystals at a specified temperature.
    Type: Application
    Filed: October 15, 2004
    Publication date: May 12, 2005
    Applicant: Ajinomoto Co., Inc.
    Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
  • Publication number: 20040024219
    Abstract: There is provided a method for producing easily highly-purified acylphenylalanine that is useful as a raw material of pharmaceutical products and the like, which comprises the step of reacting an acid chloride with phenylalanine in a mixed solvent of an organic solvent and water, while keeping the solvent under the alkali condition by using potassium hydroxide.
    Type: Application
    Filed: April 18, 2003
    Publication date: February 5, 2004
    Applicant: AJINOMOTO CO. INC
    Inventors: Michito Sumikawa, Takao Ohgane
  • Publication number: 20030229249
    Abstract: A method for producing B-type crystals of nateglinide substantially free of H-type crystals is provided, which comprises drying solvated wet crystals of nateglinide at a low temperature until no solvent remains and making a crystal conversion thereof. According to this method, B-type crystals of nateglinide can be produced at an industrial scale without allowing other forms of the crystalline polymorphism to coexist.
    Type: Application
    Filed: April 24, 2003
    Publication date: December 11, 2003
    Applicant: AJINOMOTO CO. INC
    Inventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
  • Patent number: 5488150
    Abstract: Stable crystals of N-(trans-4-isopropylcyclohexylcarbonyl)-D-phenylalanine may be produced by treating this compound with a solvent at a temperature of at least 10.degree. C. and forming crystals in the solvent at a temperature of at least 10.degree. C. For example, crystals may be formed by crystallization out of solution, or may be formed from solid particles of the compound suspended in a solvent. Crystals formed in this way have different melting point, infra red spectrum and X-ray diffraction patterns from previously known forms of the compound and have enhanced processability, eg. stability to grinding.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: January 30, 1996
    Assignee: Ajinomoto Co., Inc.
    Inventors: Michito Sumikawa, Yoshihito Koguchi, Takao Ohgane, Yasuo Irie, Satoji Takahashi
  • Patent number: 5463116
    Abstract: Stable crystals of N-(trans-4-isopropylcyclohexylcarbonyl)-D-phenylalanine may be produced by treating this compound with a solvent at a temperature of at least 10.degree. C. and forming crystals in the solvent at a temperature of at least 10.degree. C. For example, crystals may be formed by crystallization out of solution, or may be formed from solid particles of the compound suspended in a solvent. Crystals formed in this way have different melting point, infra red spectrum and X-ray diffraction patterns from previously known forms of the compound and have enhanced processability, e.g., stability to grinding.
    Type: Grant
    Filed: February 2, 1994
    Date of Patent: October 31, 1995
    Assignee: Ajinomoto Co., Inc.
    Inventors: Michito Sumikawa, Yoshihito Koguchi, Takao Ohgane, Yasuo Irie, Satoji Takahashi