Patents by Inventor Ji-Chul Yu

Ji-Chul Yu 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: 9011929
    Abstract: The present invention relates to a composition for cartilaginous tissue repair and to a production method therefor. The present invention comprises the steps of: (a) dissolving freeze-dried fibrinogen in an aprotinin solution; (b) dissolving freeze-dried thrombin in a stabilizing solution; (c) mixing an enriched collagen solution with thrombin and the stabilizing solution; and installing the fibrinogen solution (a) to one side of a dual kit and the solution (c) containing the collagen to the other side, and then mixing and injecting into damaged cartilaginous tissue. In the present invention, which is constituted as described above, biomaterials such as collagen and fibrin are mixed so as to allow damaged cartilaginous tissue to be repaired to a state allowing transplantation onto the tissue, and efficient regeneration is induced, thereby making it possible to reduce surgery-related stress on people and animals while inducing relatively rapid and efficient cartilage repair and regeneration.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: April 21, 2015
    Assignee: Sewon Cellontech Co., Ltd.
    Inventors: Hyun-Shin Park, Ji-Chul Yu, Ju-Hee Park, Jang-Hoon Kim, Hun Kim, Sae-Bom Lee, Jae-Deog Jang, Cheong-Ho Jang
  • Publication number: 20130287746
    Abstract: The present invention relates to radiation cross-linked collagen gel, and a preparation method and usage method thereof. To this end, the present invention comprises a cross-linked collagen material made by irradiating liquid collagen with radioactive rays, wherein the concentration of said collagen is specifically 0.1-10% (W/V), and the radiation dose (dose rate×time) is 0.1-40 kGy on the basis of 1 kGy/hr. The present invention configured as above can prepare a formulated collagen gel using a physical cross-linking method instead of a chemical cross-linking method, specifically carries out the formulation by mixing biocompatible materials, and provides a method capable of using a cross-linked collagen hydrogel in wound dressings, graft materials, cell cultures and the like. Therefore, the present invention provides an industrially convenient and safe preparation method, thereby instilling a good image to a customer by greatly improving the quality and confidence in the products.
    Type: Application
    Filed: February 17, 2011
    Publication date: October 31, 2013
    Applicant: Sewon Cellontech Co., Ltd.
    Inventors: Ji Chul Yu, Se Ken Yeo, Tai Hyoung Kim, Dong Sam Shu, Cheong Ho Chang
  • Publication number: 20120207736
    Abstract: The present invention relates to a composition for cartilaginous tissue repair and to a production method therefor. The present invention comprises the steps of: (a) dissolving freeze-dried fibrinogen in an aprotinin solution; (b) dissolving freeze-dried thrombin in a stabilizing solution; (c) mixing an enriched collagen solution with thrombin and the stabilizing solution; and installing the fibrinogen solution (a) to one side of a dual kit and the solution (c) containing the collagen to the other side, and then mixing and injecting into damaged cartilaginous tissue. In the present invention, which is constituted as described above, biomaterials such as collagen and fibrin are mixed so as to allow damaged cartilaginous tissue to be repaired to a state allowing transplantation onto the tissue, and efficient regeneration is induced, thereby making it possible to reduce surgery-related stress on people and animals while inducing relatively rapid and efficient cartilage repair and regeneration.
    Type: Application
    Filed: December 3, 2009
    Publication date: August 16, 2012
    Applicant: SEWON CELLONTECH CO., LTD.
    Inventors: Cheong-Ho Jang, Ji-Chul Yu, Sae-Bom Lee, Hyun-Shin Park, Hyun-Jo Kim, Jae-Deog Jang, Se-Ken Yeo, Ju-Hee Park, Seok-Jung Kim
  • Publication number: 20120201897
    Abstract: The present invention relates to a composition for cartilaginous tissue repair and to a production method therefor. The present invention comprises the steps of: (a) dissolving freeze-dried fibrinogen in an aprotinin solution; (b) dissolving freeze-dried thrombin in a stabilizing solution; (c) mixing an enriched collagen solution with thrombin and the stabilizing solution; and installing the fibrinogen solution (a) to one side of a dual kit and the solution (c) containing the collagen to the other side, and then mixing and injecting into damaged cartilaginous tissue. In the present invention, which is constituted as described above, biomaterials such as collagen and fibrin are mixed so as to allow damaged cartilaginous tissue to be repaired to a state allowing transplantation onto the tissue, and efficient regeneration is induced, thereby making it possible to reduce surgery-related stress on people and animals while inducing relatively rapid and efficient cartilage repair and regeneration.
    Type: Application
    Filed: November 17, 2009
    Publication date: August 9, 2012
    Applicant: SEWON CELLONTECH CO., LTD.
    Inventors: Hyun-Shin Park, Ji-Chul Yu, Ju-Hee Park, Jang-Hoon Kim, Hun Kim, Sae-Bom Lee, Jae-Deog Jang, Cheong-Ho Jang
  • Publication number: 20110111032
    Abstract: Disclosed herein is a method for preparing a collagen gel composition for bone regeneration comprising collecting bone marrow from animal tissues and isolating nucleated cells from the bone marrow; and mixing the nucleated cells and a bio-matrix composed of type I collagen and apatite.
    Type: Application
    Filed: July 23, 2008
    Publication date: May 12, 2011
    Applicant: SEWON CELLONTECH CO., LTD.
    Inventors: Jae-Deog Jang, Hun Kim, Ji-Chul Yu, Se-Geun Yeo, Tae-Hyoung Kim, Hyun-Shin Park, Seon-Ae Kim, Jang-Hoon Kim, Seong-Soo Kim
  • Patent number: 7781158
    Abstract: A method for separation the collagen from the various animal tissues is disclosed for preparing collagen solution and product using the same. The porcine tissues are processed to have proper form and size for acid-treatment. The acid-treatment is repeated with pepsin to separate type I or II collagens. The separated collagen is salt-treated for fractionation and ethanol-treated for obtaining 5˜10% of collagen from the initial tissue weight. The prepared tissues are processed for separating collagen through the collagen separating process. The separated collagen is processed for preparing product. The method for preparing product is comprised: treating a collagen solution having a predetermined concentration under a neutral condition at a low temperature, followed by overnight treatment at a temperature of 30 to 35° C.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: August 24, 2010
    Assignee: SEWON CELLONTECH Co., Ltd.
    Inventors: Ji-Chul Yu, Jae-Deog Jang, Cheong-Ho Chang, Sae-Bom Lee, Se-Geun Yeo, Chang-Kwon Ko
  • Publication number: 20080118947
    Abstract: A method for separation the collagen from the various animal tissues is disclosed for preparing collagen solution and product using the same. The porcine tissues are processed to have proper form and size for acid-treatment. The acid-treatment is repeated with pepsin to separate type I or II collagens. The separated collagen is salt-treated for fractionation and ethanol-treated for obtaining 5˜10% of collagen from the initial tissue weight. The prepared tissues are processed for separating collagen through the collagen separating process. The separated collagen is processed for preparing product. The method for preparing product is comprised: treating a collagen solution having a predetermined concentration under a neutral condition at a low temperature, followed by overnight treatment at a temperature of 30 to 35° C.
    Type: Application
    Filed: March 9, 2006
    Publication date: May 22, 2008
    Inventors: Ji-Chul Yu, Jae-Deog Jang, Cheong-Ho Chang, Sae-Bom Lee, Se-Geun Yeo, Chang-Kwon Ko