Patents by Inventor Katsuya Togawa

Katsuya Togawa 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: 9028688
    Abstract: Blood separation material which separates blood collected in a blood-sampling container, into blood cells and plasma or serum within a short period of time. An apparatus for separating blood with the blood separation material. An instrument for separating blood having a first hollow needle extending toward one end, a second hollow needle extending toward the other end, a tubular container with an inner space in which the blood flows, and a blood separation material. A container with a first channel for supplying blood into an inner space through which blood flows from the needlepoint of the first hollow needle into the inner space, a second channel for blood to flow out from the inner space toward the needlepoint of the second hollow needle, and a third channel which allows air to flow from the outer space toward the needlepoint of the first hollow needle.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: May 12, 2015
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Ryusuke Okamoto, Katsuya Togawa
  • Patent number: 8795957
    Abstract: The present invention provides a blood collection container capable of allowing blood to coagulate in a short time and preventing blood from coagulating with bubbles contained therein and thus preventing formation of bubbly clots when used to collect blood therein. A blood collection container 1 stores a blood coagulation promoting agent 4 for promoting blood coagulation and an antifoaming agent 5, which is a polyoxyalkylene or a derivative thereof. The amount of the antifoaming agent 5 is 2.0×10?3 to 0.2 mg per mL of blood to be collected in the blood collection container 1.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: August 5, 2014
    Assignee: Sekisui Medical Co., Ltd.
    Inventors: Tomonori Inoue, Yuuji Setoguchi, Ryusuke Okamoto, Katsuya Togawa
  • Patent number: 8586323
    Abstract: The present invention provides a blood coagulation promoter capable of exerting both excellent blood coagulation promoting ability and excellent blood clot detaching ability; and a blood collection tube accommodating the blood coagulation promoter. The present invention provides a blood coagulation promoter which includes a hardly water soluble polyoxyalkylene derivative; a partially saponificated polyvinyl alcohol; at least one substance selected from the group consisting of adsorptive inorganic substances and hydrolases capable of hydrolyzing a bond between Arg and an arbitrary amino acid reside and/or a bond between Lys and an arbitrary amino acid residue in a peptide chain; a polyvinylpyrrolidone; and preferably a water-soluble silicone oil, and a blood collection tube in which the blood coagulation promoter is accommodated in a tubular vessel having a bottom.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: November 19, 2013
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Ryusuke Okamoto, Katsuya Togawa, Hironobu Isogawa
  • Patent number: 7993847
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: August 9, 2011
    Assignees: Sekisui Medical Co., Ltd., Nittobo Medical Co., Ltd., Toyo Boseki Kabushiki Kaisha
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa
  • Publication number: 20110144536
    Abstract: The present invention provides a blood collection container capable of allowing blood to coagulate in a short time and preventing blood from coagulating with bubbles contained therein and thus preventing formation of bubbly clots when used to collect blood therein. A blood collection container 1 stores a blood coagulation promoting agent 4 for promoting blood coagulation and an antifoaming agent 5, which is a polyoxyalkylene or a derivative thereof. The amount of the antifoaming agent 5 is 2.0×10?3 to 0.2 mg per mL of blood to be collected in the blood collection container 1.
    Type: Application
    Filed: February 23, 2011
    Publication date: June 16, 2011
    Inventors: Tomonori Inoue, Yuuji Setoguchi, Ryusuke Okamoto, Katsuya Togawa
  • Patent number: 7927810
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: April 19, 2011
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa
  • Publication number: 20100248329
    Abstract: The present invention provides a blood coagulation promoter capable of exerting both excellent blood coagulation promoting ability and excellent blood clot detaching ability, and a blood collection tube accommodating the blood coagulation promoter. The present invention provides a blood coagulation promoter which includes a hardly water soluble polyoxyalkylene derivative; a partially saponificated polyvinyl alcohol; at least one substance selected from the group consisting of adsorptive inorganic substances and hydrolases capable of hydrolyzing a bond between Arg and an arbitrary amino acid reside and/or a bond between Lys and an arbitrary amino acid residue in a peptide chain; a polyvinylpyrrolidone; and preferably a water-soluble silicone oil, and a blood collection tube in which the blood coagulation promoter is accommodated in a tubular vessel having a bottom.
    Type: Application
    Filed: April 9, 2010
    Publication date: September 30, 2010
    Inventors: Ryusuke Okamoto, Katsuya Togawa, Hironobu Isogawa
  • Patent number: 7767466
    Abstract: A method for filtrating liquid sample such as blood or the like with a filter member utilizing inner vacuum, the same enabling completion of filtration without removing a stopper, and superior in safety and being free from contamination. In collecting and filtrating the liquid sample using a sample collection vessel 1, in which a sample-collecting part 3 containing a filter member 4 is inserted in a vacuumed sample-storing part 2, the sample storing part 2 and sample-collecting part 3 are air-tightly sealed with a stopper 5, the liquid sample such as blood or the like collected in the sample-collecting part 3 is filtrated by the filter member 4. When the filtration stops, a hollow needle 12 is pierced through the stopper 5 and thus the sample-collecting part 3 is communicated with atmosphere, thereby the pressure in the sample-collecting part 3 being enhanced upper than in atmosphere to enable the filtration again.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: August 3, 2010
    Assignees: Sekisui Medical Co., Ltd., I-Design Co., Ltd., Nittobo Medical Co., Ltd.
    Inventors: Katsuya Togawa, Hironobu Isogawa
  • Patent number: 7744820
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: June 29, 2010
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa
  • Publication number: 20090050553
    Abstract: It is intended to provide a material by which blood having been collected into a blood-sampling container can be conveniently separated into blood cells and the plasma or the serum within a short period of time, and an apparatus for separating blood which is provided with this blood separation material.
    Type: Application
    Filed: June 26, 2006
    Publication date: February 26, 2009
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Ryusuke Okamoto, Katsuya Togawa
  • Publication number: 20070105156
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Application
    Filed: December 7, 2006
    Publication date: May 10, 2007
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa
  • Publication number: 20070082370
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Application
    Filed: December 7, 2006
    Publication date: April 12, 2007
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa
  • Publication number: 20060199275
    Abstract: A method for filtrating liquid sample such as blood or the like with a filter member utilizing inner vacuum, the same enabling completion of filtration without removing a stopper, and superior in safety and being free from contamination. In collecting and filtrating the liquid sample using a sample collection vessel 1, in which a sample-collecting part 3 containing a filter member 4 is inserted in a vacuumed sample-storing part 2, the sample storing part 2 and sample-collecting part 3 are air-tightly sealed with a stopper 5, the liquid sample such as blood or the like collected in the sample-collecting part 3 is filtrated by the filter member 4. When the filtration stops, a hollow needle 12 is pierced through the stopper 5 and thus the sample-collecting part 3 is communicated with atmosphere, thereby the pressure in the sample-collecting part 3 being enhanced upper than in atmosphere to enable the filtration again.
    Type: Application
    Filed: April 22, 2004
    Publication date: September 7, 2006
    Inventors: Katsuya Togawa, Hironobu Isogawa
  • Publication number: 20060171915
    Abstract: The present invention provides a blood coagulation promoter capable of exerting both excellent blood coagulation promoting ability and excellent blood clot detaching ability; and a blood collection tube accommodating the blood coagulation promoter. The present invention provides a blood coagulation promoter which includes a hardly water soluble polyoxyalkylene derivative; a partially saponificated polyvinyl alcohol; at least one substance selected from the group consisting of adsorptive inorganic substances and hydrolases capable of hydrolyzing a bond between Arg and an arbitrary amino acid reside and/or a bond between Lys and an arbitrary amino acid residue in a peptide chain; a polyvinylpyrrolidone; and preferably a water-soluble silicone oil, and a blood collection tube in which the blood coagulation promoter is accommodated in a tubular vessel having a bottom.
    Type: Application
    Filed: April 21, 2004
    Publication date: August 3, 2006
    Inventors: Ryusuke Okamoto, Katsuya Togawa, Hironobu Isogawa
  • Publication number: 20060029923
    Abstract: A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.
    Type: Application
    Filed: November 18, 2003
    Publication date: February 9, 2006
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Katsuya Togawa, Ryusuke Okamoto, Hironobu Isogawa