Patents by Inventor Makoto Nishigishi

Makoto Nishigishi 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: 10850010
    Abstract: Some of strands of a stent are disposed using a strand made of a platinum alloy material. In the stent (10) formed by helicoidally braiding a plurality of strands, some even-numbered strands among the plurality of strands are disposed using a platinum alloy material.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: December 1, 2020
    Assignee: PENTAS Inc.
    Inventor: Makoto Nishigishi
  • Patent number: 10744008
    Abstract: A tip end portion of a strand forming a stent is rounded off. In a stent 10 formed by helicoidally braiding a plurality of strands 20, the tip end portion of each of the strands 20 is rounded off.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: August 18, 2020
    Assignee: PENTAS Inc.
    Inventor: Makoto Nishigishi
  • Patent number: 10617541
    Abstract: A strand made of a platinum alloy material is prevented from protruding from both ends of a stent when some strands of the stent are disposed using the strand made of the platinum alloy material. In a stent (10) which is formed by helicoidally braiding a plurality of strands, some strands among the plurality of strands are disposed using a strand made of a platinum alloy material, and a length of the strand made of the platinum alloy material is made shorter than lengths of other strands by a length of the strand made of the platinum alloy material which is estimated to protrude from the stent.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: April 14, 2020
    Assignee: PENTAS Inc.
    Inventor: Makoto Nishigishi
  • Patent number: 10383645
    Abstract: A catheter includes a protective film covering an inner periphery of a proximal end side of a tubular mesh member, the tubular mesh member being expandable and contractible in a radial direction. The tubular mesh member including a first wire that is interwoven with a second wire. The protective film being joined only to any one of either the first wire or the second wire. The catheter has improved efficiency for removing a blockage in a blood vessel, and the catheter can prevent breakage of a retrograde guide wire. Additionally, the mesh member having the protective film is able to smoothly expand and contract.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: August 20, 2019
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 10363391
    Abstract: A catheter including an outer tube; a first inner tube disposed within the outer tube; a second inner tube disposed within the outer tube and parallel to the first inner tube, and having an insertion opening at its proximal end and a distal end opening at its distal end; and a first core wire and a second core wire disposed between the first inner tube and an outer tube. The second inner tube extends from a medial region of the catheter to a distal end of the catheter. A distal end of the first core wire is located distal to the insertion opening of the second inner tube, and a distal end of the second core wire is located proximal to the insertion opening of the second inner tube. The second core wire can move between the outer tube and the first inner tube.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: July 30, 2019
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 10357276
    Abstract: A medical device includes an expandable-and-contractible member capable of radially expanding and radially contracting, an incising member disposed on an outer circumference of the expandable-and-contractible member and having a hollow portion, a core wire inserted in the hollow portion, a distal tip, and a ring. The core wire is capable of sliding in a longitudinal direction of the medical device as the expandable-and-contractible member expands or contracts. The incising member is therefore not likely to come off upon radial expansion or radial contraction of the expandable-and-contractible member, and is therefore not likely to interfere with the expanding or contracting movement of the expandable-and-contractible member.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: July 23, 2019
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Publication number: 20190053923
    Abstract: A tip end portion of a strand forming a stent is rounded off. In a stent 10 formed by helicoidally braiding a plurality of strands 20, the tip end portion of each of the strands 20 is rounded off.
    Type: Application
    Filed: February 9, 2017
    Publication date: February 21, 2019
    Inventor: Makoto NISHIGISHI
  • Publication number: 20190046694
    Abstract: Some of strands of a stent are disposed using a strand made of a platinum alloy material. In the stent (10) formed by helicoidally braiding a plurality of strands, some even-numbered strands among the plurality of strands are disposed using a platinum alloy material.
    Type: Application
    Filed: February 22, 2017
    Publication date: February 14, 2019
    Inventor: Makoto NISHIGISHI
  • Publication number: 20190046340
    Abstract: A strand made of a platinum alloy material is prevented from protruding from both ends of a stent when some strands of the stent are disposed using the strand made of the platinum alloy material. In a stent (10) which is formed by helicoidally braiding a plurality of strands, some strands among the plurality of strands are disposed using a strand made of a platinum alloy material, and a length of the strand made of the platinum alloy material is made shorter than lengths of other strands by a length of the strand made of the platinum alloy material which is estimated to protrude from the stent.
    Type: Application
    Filed: February 22, 2017
    Publication date: February 14, 2019
    Inventor: Makoto NISHIGISHI
  • Patent number: 10143575
    Abstract: A guide wire may include a core shaft and an external coil body covering a distal portion of the core shaft. The external coil body includes a first coil portion and a second coil portion that is distal to the first coil portion. An outside diameter of the second coil portion is smaller than an outside diameter of the first coil portion. Similarly, the guide wire may include a core shaft, a first external coil body, and a second external coil body. An outside diameter of the second external coil body is smaller than an outside diameter of the first external coil body. The external coil body or first and second external coil bodies enable the performance of a pushing-out operation and a drawing-in operation of the stent; yet, the flexibility of the guide wire is maintained.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 4, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 10085863
    Abstract: A guide wire may include a core shaft and an external coil body covering a distal portion of the core shaft. The external coil body includes a first coil portion and a second coil portion that is distal to the first coil portion. An outside diameter of the second coil portion is smaller than an outside diameter of the first coil portion. Similarly, the guide wire may include a core shaft, a first external coil body, and a second external coil body. An outside diameter of the second external coil body is smaller than an outside diameter of the first external coil body. The external coil body or first and second external coil bodies enable the performance of a pushing-out operation and a drawing-in operation of the stent; yet, the flexibility of the guide wire is maintained.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: October 2, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 9999749
    Abstract: A catheter includes an inner layer, and a braid provided on an outer periphery of the inner layer. The braid includes a first wire and a second wire that are woven together. The catheter further includes a tip provided on a distal end of the inner layer and a distal end of the braid. A residual portion having a sharp shape formed at a distal end of the first wire when the first wire is cut is not left untreated, but is formed into a bulging portion.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: June 19, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventors: Tadanori Hiroshige, Makoto Nishigishi, Kenji Kaneda, Tatsuhiko Kajii
  • Publication number: 20180154107
    Abstract: A catheter including an outer tube; a first inner tube disposed within the outer tube; a second inner tube disposed within the outer tube and parallel to the first inner tube, and having an insertion opening at its proximal end and a distal end opening at its distal end; and a first core wire and a second core wire disposed between the first inner tube and an outer tube. The second inner tube extends from a medial region of the catheter to a distal end of the catheter. A distal end of the first core wire is located distal to the insertion opening of the second inner tube, and a distal end of the second core wire is located proximal to the insertion opening of the second inner tube. The second core wire can move between the outer tube and the first inner tube.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 7, 2018
    Applicant: ASAHI INTECC CO., LTD.
    Inventor: Makoto NISHIGISHI
  • Patent number: 9937069
    Abstract: A pusher guide wire and a delivery system can smoothly pass through the inside of even a curved blood vessel without causing excessive burden to a stent, a catheter, and the like. A pusher guide wire has a tubular member capable of moving in a radial direction relative to a core shaft of the pusher guide wire. When the pusher guide wire is used together with a stent in a delivery system, the tubular member makes contact with the stent in an appropriate manner when passing through the inside of a curved blood vessel. The stent may include a proximal end engagement portion provided at a proximal end of the stent. When the stent is placed so that the proximal end engagement portion engages with the pusher guide wire, the stent can be pulled back inside the catheter by pulling the pusher guide wire in the proximal direction.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: April 10, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 9925078
    Abstract: A stent delivery system includes a pusher guide wire for delivering a stent having an anchor member. The pusher guide wire includes a core shaft, a coil body that is disposed around a distal portion of the core shaft and includes a tapered portion having an outer diameter that decreases toward a distal end of the coil body, and a protruded portion fixed to the coil body at a position distal to the tapered portion. The anchor member is positioned between the tapered portion and the protruded portion when the stent is delivered using the pusher guide wire. The anchor member can therefore be pushed in the distal direction by the tapered portion of the coil body. Moreover, the stent can be retracted into the catheter by pulling the pusher guide wire in the proximal direction so that the protruded portion contacts the anchor member.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: March 27, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Patent number: 9919128
    Abstract: A catheter can efficiently transmit an operator's pushing force to a distal end of the catheter with a reduced risk of getting caught at a curved region of a lumen (e.g., a blood vessel, bile duct, pancreatic duct or the like). The catheter includes a first core wire and a second core wire disposed between an inner tube and an outer tube. The second core wire can move to an optimal position depending on external forces exerted at a curved region of the lumen when the catheter is inserted into the curved region. Therefore, there is a reduced risk that the first core wire and the second core wire will interfere with each other, which would prevent the catheter from bending along the lumen and potentially break one or both of the first core wire and the second core wire.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: March 20, 2018
    Assignee: ASAHI INTECC CO., LTD.
    Inventor: Makoto Nishigishi
  • Publication number: 20170319231
    Abstract: A medical device includes an expandable-and-contractible member capable of radially expanding and radially contracting, an incising member disposed on an outer circumference of the expandable-and-contractible member and having a hollow portion, a core wire inserted in the hollow portion, a distal tip, and a ring. The core wire is capable of sliding in a longitudinal direction of the medical device as the expandable-and-contractible member expands or contracts. The incising member is therefore not likely to come off upon radial expansion or radial contraction of the expandable-and-contractible member, and is therefore not likely to interfere with the expanding or contracting movement of the expandable-and-contractible member.
    Type: Application
    Filed: December 29, 2016
    Publication date: November 9, 2017
    Applicant: ASAHI INTECC CO., LTD.
    Inventor: Makoto NISHIGISHI
  • Publication number: 20170105742
    Abstract: A catheter includes a protective film covering an inner periphery of a proximal end side of a tubular mesh member, the tubular mesh member being expandable and contractible in a radial direction. The tubular mesh member including a first wire that is interwoven with a second wire. The protective film being joined only to any one of either the first wire or the second wire. The catheter has improved efficiency for removing a blockage in a blood vessel, and the catheter can prevent breakage of a retrograde guide wire. Additionally, the mesh member having the protective film is able to smoothly expand and contract.
    Type: Application
    Filed: July 13, 2016
    Publication date: April 20, 2017
    Applicant: ASAHI INTECC CO., LTD.
    Inventor: Makoto NISHIGISHI
  • Publication number: 20170072166
    Abstract: A catheter includes an inner layer, and a braid provided on an outer periphery of the inner layer. The braid includes a first wire and a second wire that are woven together. The catheter further includes a tip provided on a distal end of the inner layer and a distal end of the braid. A residual portion having a sharp shape formed at a distal end of the first wire when the first wire is cut is not left untreated, but is formed into a bulging portion.
    Type: Application
    Filed: November 22, 2016
    Publication date: March 16, 2017
    Applicant: ASAHI INTECC CO., LTD.
    Inventors: Tadanori HIROSHIGE, Makoto NISHIGISHI, Kenji KANEDA, Tatsuhiko KAJII
  • Patent number: 9545496
    Abstract: A catheter includes an inner layer, and a braid provided on an outer periphery of the inner layer. The braid includes a first wire and a second wire that are woven together. The catheter further includes a tip provided on a distal end of the inner layer and a distal end of the braid. A residual portion having a sharp shape formed at a distal end of the first wire when the first wire is cut is not left untreated, but is formed into a bulging portion.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: January 17, 2017
    Assignee: ASAHI INTECC CO., LTD.
    Inventors: Tadanori Hiroshige, Makoto Nishigishi, Kenji Kaneda, Tatsuhiko Kajii