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).
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Publication number: 20200229955Abstract: 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: ApplicationFiled: April 8, 2020Publication date: July 23, 2020Inventors: Shoji UESUGI, Toshiki SAOTOME, Atsushi KINUGASA, Michito SUMIKAWA, Noriko IIJIMA
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Patent number: 9029333Abstract: 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: GrantFiled: November 24, 2009Date of Patent: May 12, 2015Assignee: Advanced Renal Technologies, Inc.Inventors: Yoshihiro Sugiyama, Yuichi Iwai, Michito Sumikawa, Naotaka Kuroda
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Patent number: 7977507Abstract: 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: GrantFiled: December 15, 2010Date of Patent: July 12, 2011Assignee: Ajinomoto Co., Inc.Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
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Publication number: 20110092733Abstract: 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: ApplicationFiled: December 15, 2010Publication date: April 21, 2011Applicant: Ajinomoto Co., Inc.Inventors: Yoshihito KOGUCHI, Tomoko NAKAO, Michito SUMIKAWA
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Patent number: 7888531Abstract: 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: GrantFiled: June 16, 2009Date of Patent: February 15, 2011Assignee: Ajinomoto Co., Inc.Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
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Publication number: 20100120702Abstract: 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: ApplicationFiled: November 24, 2009Publication date: May 13, 2010Applicant: Ajinomoto Co., Inc.Inventors: Yoshihiro Sugiyama, Yuichi Iwai, Michito Sumikawa, Naotaka Kuroda
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Patent number: 7659428Abstract: 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: GrantFiled: December 28, 2005Date of Patent: February 9, 2010Assignee: Ajinomoto Co., Inc.Inventors: Michito Sumikawa, Takao Ohgane
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Publication number: 20090253933Abstract: 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: ApplicationFiled: June 16, 2009Publication date: October 8, 2009Applicant: Ajinomoto Co., Inc.Inventors: Yoshihito KOGUCHI, Tomoko Nakao, Michito Sumikawa
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Patent number: 7586001Abstract: 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: GrantFiled: April 4, 2008Date of Patent: September 8, 2009Assignee: Ajinomoto Co., Inc.Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
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Patent number: 7544834Abstract: 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: GrantFiled: June 4, 2007Date of Patent: June 9, 2009Assignee: Ajinomoto Co., Inc.Inventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
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Publication number: 20080194867Abstract: 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: ApplicationFiled: April 4, 2008Publication date: August 14, 2008Applicant: Ajinomoto Co., Inc.Inventors: Yoshihito KOGUCHI, Tomoko NAKAO, Michito SUMIKAWA
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Patent number: 7411089Abstract: 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: GrantFiled: October 15, 2004Date of Patent: August 12, 2008Assignee: Ajinomoto Co., Inc.Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
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Publication number: 20070232829Abstract: 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: ApplicationFiled: June 4, 2007Publication date: October 4, 2007Applicant: AJINOMOTO CO. INCInventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
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Publication number: 20060155143Abstract: 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: ApplicationFiled: December 28, 2005Publication date: July 13, 2006Applicant: AJINOMOTO CO. INCInventors: Michito Sumikawa, Takao Ohgane
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Patent number: 7030268Abstract: 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: GrantFiled: April 18, 2003Date of Patent: April 18, 2006Assignee: Ajinomoto Co., Inc.Inventors: Michito Sumikawa, Takao Ohgane
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Publication number: 20050101672Abstract: 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: ApplicationFiled: October 15, 2004Publication date: May 12, 2005Applicant: Ajinomoto Co., Inc.Inventors: Yoshihito Koguchi, Tomoko Nakao, Michito Sumikawa
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Publication number: 20040024219Abstract: 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: ApplicationFiled: April 18, 2003Publication date: February 5, 2004Applicant: AJINOMOTO CO. INCInventors: Michito Sumikawa, Takao Ohgane
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Publication number: 20030229249Abstract: 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: ApplicationFiled: April 24, 2003Publication date: December 11, 2003Applicant: AJINOMOTO CO. INCInventors: Michito Sumikawa, Makoto Maruo, Kazuo Miyazaki, Shigehiro Nishina, Yukiko Matsuzawa
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Patent number: 5488150Abstract: 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: GrantFiled: December 14, 1993Date of Patent: January 30, 1996Assignee: Ajinomoto Co., Inc.Inventors: Michito Sumikawa, Yoshihito Koguchi, Takao Ohgane, Yasuo Irie, Satoji Takahashi
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Patent number: 5463116Abstract: 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: GrantFiled: February 2, 1994Date of Patent: October 31, 1995Assignee: Ajinomoto Co., Inc.Inventors: Michito Sumikawa, Yoshihito Koguchi, Takao Ohgane, Yasuo Irie, Satoji Takahashi