Patents Assigned to U & I Corporation
  • Patent number: 10052405
    Abstract: This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0<(ii)/(i)?5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: August 21, 2018
    Assignee: U&I Corporation
    Inventors: Ja-Kyo Koo, Hyun-Kwang Seok, Seok-Jo Yang, Yu-Chan Kim, Sung-Youn Cho, Jong-Tack Kim
  • Patent number: 9943625
    Abstract: The present invention relates to a magnesium alloy having controlled corrosion resistance properties, which comprises magnesium (Mg) and an alloying element and includes a magnesium phase and a phase composed of magnesium and the alloying element, wherein the difference in electrical potential between the magnesium phase and the phase composed of magnesium and the alloying element is greater than 0 V but not greater than 0.2 V.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: April 17, 2018
    Assignee: U&I Corporation
    Inventors: Ja-Kyo Koo, Hyun-Kwang Seok, Seok-Jo Yang, Yu-Chan Kim, Sung-Youn Cho, Jong-Tack Kim
  • Publication number: 20120089141
    Abstract: Disclosed is a direction controllable electrode body, comprising a flexible body which comprises: a first electrode, comprising a body, a first cap joined to one end of the body, and a first electrode line connected to an other end of the body; an insulator in partial contact with the body and the first cap of the first electrode, said insulator functioning to insulate the first electrode from the second electrode; a second electrode, comprising a first ring in contact with the insulator, and a second electrode line connected to one end of the first ring; and a direction controller, comprising a first direction controlling wire communicating with the first electrode or the second electrode to control direction of the electrode body. Also, a guide pipe is provided for leading the electrode body to a target tissue.
    Type: Application
    Filed: June 9, 2009
    Publication date: April 12, 2012
    Applicants: Korea University Research and Business Foundation, U&I Corporation
    Inventors: Sang-Heon Lee, Sung-Youn Cho, Bong-Su Kang, Sang-Woon Kim, Ja-kyo Koo, Jong-Tack Kim
  • Publication number: 20120065634
    Abstract: The present invention relates to treating an inter-vertebral disc, in particular, to a method of treating an inter-vertebral disc by effectively ablating a tissue within a disc, in which herniation of nucleus pulposus occurs. A method of treating an inter-vertebral disc according to one embodiment of the present invention relates to treatment using a guidable electrode to be inserted into an inter-vertebral disc of a patient, in which the treatment comprises a step of inserting a front end of a needle unit from the outside of annulus fibrosus into the inside of the annulus fibrosus, a step of inserting a guidable electrode through the rear of the needle unit, a step of adjusting position of the end of the electrode to be adjacent to a target tissue within the annulus fibrosus, and a step of ablating a tissue within nucleus pulposus by applying electrical energy to the electrode.
    Type: Application
    Filed: September 14, 2010
    Publication date: March 15, 2012
    Applicants: KOREA UNIVERSITY INDUSTRIAL & ACADEMIC COLLABORATION FOUNDATION, U&I CORPORATION
    Inventors: Sang-Heon LEE, Sung-Youn Cho, Bong-Su Kang, Sang Wun Kim, Ja-Kyo Koo, Jong-Tack Kim
  • Publication number: 20110054629
    Abstract: The present invention provides a composite implant comprising pores of a porous structure filled with a biodegradable magnesium-based alloy. Further, the present invention provides a composite implant which filles pores of the porous structure prepared by a metal, a ceramic or a polymer with a biodegradable magnesium-based alloy. Mechanical properties of the composite implant of the present invention are improved because a magnesium-based alloy filled in its pores increases the strength of a porous structure comprised of a metal, a ceramic or a polymer. Further, it can be expected that the magnesium-based alloy filled in the porous structure is decomposed in a living body, thus increasing bone formation rate. Accordingly bone tissue can be rapidly formed because the composite implant of the present invention has high strength and excellent interfacial force between the composite implant and bone tissue, compared to conventional porous materials.
    Type: Application
    Filed: March 18, 2009
    Publication date: March 3, 2011
    Applicant: U&I CORPORATION
    Inventors: Hyun-Kwang Seok, Seok-Jo Yang, Yu-Chan Kim, Ja-Kyo Koo
  • Publication number: 20080249525
    Abstract: The present invention relates to a radiofrequency electrode for selective ablation of a body tissue, comprising a first electrode 110 and a second electrode 120 to be inserted, through a catheter 60, into the body tissue, wherein the first electrode tip 112 formed at the end of the first electrode 110 and the second electrode tip 122 formed at the end of the second electrode 120 are bonded at a predetermined interval. Specifically, a coil spring is bonded to the ends of the first electrode 110 and the second electrode 120, and the coil spring is configured to have its end part bent in the free state and be transformed by pulling either or both of the first electrode and the second electrode. By using the electrode, ablation of a desired tissue region in a body with radiofrequency by easily controlling the direction and the position of the electrode tip can be easily performed.
    Type: Application
    Filed: November 9, 2006
    Publication date: October 9, 2008
    Applicant: U & I CORPORATION
    Inventors: Sang-Heon Lee, Chang-Mo Hwang, Byung-Jo Kim, Kyung Sun, Jung-Hwa Hong
  • Patent number: 6905500
    Abstract: Disclosed is a bone fixation apparatus. This device comprises a bone screw having a head; a cap member placed on an upper part of the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively accommodated and held, and a U-shaped channel through which a support bar extends; and a compression member threadedly coupled into the receiver member to downwardly bias the support bar. A multitude of stepped portions are formed at a lower end and inner surface of the receiver member to be brought into linear contact with an outer surface of a lower part of the head so that the supporting force for the head of the bone screw is increased.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: June 14, 2005
    Assignee: U & I Corporation
    Inventors: Chang-Hun Jeon, Howard S. An, Ja-Kyo Koo
  • Publication number: 20040102781
    Abstract: Disclosed is a bone fixation apparatus. This apparatus comprises a bone screw having a head; a cap member placed on the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively accommodated and held, and a U-shaped channel through which a support bar extends; and a compression member threadedly coupled into the receiver member to downwardly bias the support bar; wherein a multitude of stepped portions are formed at the lower end and on the inner surface of the receiver member, an accommodating chamber is defined above the stepped portions to accommodate therein the cap member, internal threads are formed on the inner surface of the receiver member to allow the compression member to be threadedly coupled therewith, and an outward flange is formed around the upper end of the cap member, thereby preventing movement of a bone, improving the assemblability of the bone fixation apparatus and keeping a cap member from being released.
    Type: Application
    Filed: November 29, 2002
    Publication date: May 27, 2004
    Applicant: U & I Corporation
    Inventor: Chang-Hun Jeon
  • Patent number: 4874066
    Abstract: A shock absorber including a piston with two relatively movable elements defining a variable-sized, fluid-filled space. The size of the space is decreased when subjected to external fluid pressure and fluid flow through the piston is modified in response to such decrease.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: October 17, 1989
    Assignee: S.U.I. Corporation
    Inventor: Ilan Silberstein