Patents by Inventor Yun Seok Choe

Yun Seok Choe 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: 11883785
    Abstract: Provided is a reverse osmosis membrane comprising: a support layer comprising a support and a polysulfone layer; and an active layer, wherein a compression modulus is from 20 MPa to 40 MPa, to a method for manufacturing the same, and a water-treatment module.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: January 30, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Ayoung Lee, Yun Seok Choe, Chong Kyu Shin, Phill Lee
  • Patent number: 11707717
    Abstract: Provided is a separation membrane leaf and a spiral wound module and an apparatus including the same, the separation membrane leaf comprising a separator, a supply-side flow channel material, and a permeation-side flow channel material comprising a tricot, the tricot comprising an adhesive part, and at least a part of the adhesive part being a low density part of the tricot, compared to the rest, wherein the tricot comprises at least one wale, at least one course, and an intersection point at which the at least one wale and the at least one course intersect, and the average distance between two intersection points arranged in parallel in the direction in which the wale of the low-density part is arranged is at least 1.25 times the average distance between two intersection points arranged in parallel in the direction in which the wale of the part other than the low-density part is arranged.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: July 25, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Phill Lee, Yun Seok Choe, Gwang Hun Choi, Soo Hyun Kim, Dong Hyeok Shin
  • Publication number: 20210086137
    Abstract: Provided is a separation membrane leaf and a spiral wound module and an apparatus including the same, the separation membrane leaf comprising a separator, a supply-side flow channel material, and a permeation-side flow channel material comprising a tricot, the tricot comprising an adhesive part, and at least a part of the adhesive part being a low density part of the tricot, compared to the rest, wherein the tricot comprises at least one wale, at least one course, and an intersection point at which the at least one wale and the at least one course intersect, and the average distance between two intersection points arranged in parallel in the direction in which the wale of the low-density part is arranged is at least 1.25 times the average distance between two intersection points arranged in parallel in the direction in which the wale of the part other than the low-density part is arranged.
    Type: Application
    Filed: July 24, 2019
    Publication date: March 25, 2021
    Inventors: Phill LEE, Yun Seok CHOE, Gwang Hun CHOI, Soo Hyun KIM, Dong Hyeok SHIN
  • Publication number: 20210001279
    Abstract: Provided is a reverse osmosis membrane comprising: a support layer comprising a support and a polysulfone layer; and an active layer, wherein a compression modulus is from 20 MPa to 40 MPa, to a method for manufacturing the same, and a water-treatment module.
    Type: Application
    Filed: May 9, 2019
    Publication date: January 7, 2021
    Inventors: Ayoung LEE, Yun Seok CHOE, Chong Kyu SHIN, Phill LEE
  • Patent number: 10611109
    Abstract: Provided is a manufacturing method of an optical film, which manufactures an optical film in which at least a first film and a second film are stacked, the method including: pressing the first film and the second film with the optical film by passing both the first film and the second film between a pair of pressing rolls; forming a slit line in a width direction of the optical film by cutting the second film without cutting the first film at a rear end of a connection portion when the connection portion is included, to which a unit film is connected by a connection member between the first film and the second film which are pressed in the pressing; and conveying the optical film by passing the optical film with the slit line in the slit forming between a pair of conveying rolls.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: April 7, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Jeong Hwan Lee, Yun Seok Choe, Joo Sang Kim, Do Won Yang, Yong Gou Lee, Bong Su Jeung, Jea Han Ryoo
  • Publication number: 20170368772
    Abstract: Provided is a manufacturing method of an optical film, which manufactures an optical film in which at least a first film and a second film are stacked, the method including: pressing the first film and the second film with the optical film by passing both the first film and the second film between a pair of pressing rolls; forming a slit line in a width direction of the optical film by cutting the second film without cutting the first film at a rear end of a connection portion when the connection portion is included, to which a unit film is connected by a connection member between the first film and the second film which are pressed in the pressing; and conveying the optical film by passing the optical film with the slit line in the slit forming between a pair of conveying rolls.
    Type: Application
    Filed: June 21, 2017
    Publication date: December 28, 2017
    Inventors: Jeong Hwan LEE, Yun Seok CHOE, Joo Sang KIM, Do Won YANG, Yong Gou LEE, Bong Su JEUNG, Jea Han RYOO
  • Patent number: 7473426
    Abstract: A yeast extract or yeast-derived bioactive peptide having an activity of selectively inhibiting reuptake of serotonin and norepinephrine, which can be effectively used in preventing or treating various diseases related to reuptake of serotonin and norepinephrine, especially depression, anxiety, stress, fatigue and obesity is provided. Also, a yeast extract or yeast-derived bioactive peptide having activities as an anti-stress agent, an anti-fatigue agent, premenstrual syndrome (PMS) and menstrual pain relaxants, and a brain-neurotrophic factor, and a method for preparing the bioactive peptide is provided. The yeast extract or yeast-derived bioactive peptide is effective in relieving stress, nervousness, anxiety, tension, insomnia, fatigue, and imbalance in the autonomic nerve regulation.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: January 6, 2009
    Inventors: Yun Seok Choe, Il Jun Kang, Hyung Joo Suh, Young Chun Choi, Hee Sun Yun, Kyung Mi Kim, Sang Wook Ahn, Ki Won Kim, Won Jun Hwang, Jin Man Kim
  • Publication number: 20040101934
    Abstract: A yeast-derived bioactive peptide having activities as an anti-stress agent, an anti-fatigue agent, premenstrual syndrome(PMS) and menstrual pain relaxants, and a brain-neurotrophic factor, and a method for preparing the bioactive peptide are provided. The preparation method involves incubating a strain of yeast, which is a natural source reconigzed as safe, until a maximum growth phase. The generation and release of anti-stress substances beneficial to the human body from the yeast are induced by properly applying a physical or chemical stress, such as high-temperature heating, ultrasonic waves, vibration, pH variations, etc. Next the yeast is autolyzed and purified to obtain the bioactive peptide. The yeast-derived bioactive peptide is effective in relieving stress, nervousness, anxiety, tension, insomnia, fatigue, and imbalance in the autonomic nerve regulation.
    Type: Application
    Filed: August 27, 2003
    Publication date: May 27, 2004
    Inventors: Yun Seok Choe, Il Jun Kang, Hyung Joo Suh, Young Chun Choi, Hee Sun Yun, Kyung Mi Kim, Sang Wook Ahn