Patents by Inventor Kee-Young Lee

Kee-Young Lee 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).

  • Publication number: 20210349336
    Abstract: The present application provides an optical film. By controlling transmittance of a liquid crystal layer comprising a radical initiator for the maximum absorption wavelength of the radical initiator, the present application can provide an optical film having a liquid crystal layer having excellent resistance to external stimuli and excellent optical properties. Such an optical film can have various forms and can be used in various fields.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 11, 2021
    Inventors: Jae Hong PARK, Hyung Il YANG, Kee Young LEE, Keon Woo KIM, Sang Jo BAE, Woo Yong CHO, Sung Yoon LEE, Kyung Gu LEE
  • Patent number: 10870621
    Abstract: The present invention relates to a process for preparing latanoprostene bunod and an intermediate therefor. In accordance with the preparation process of the present invention, latanoprostene bunod can be efficiently and cost-effectively prepared while reducing side reactions.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: December 22, 2020
    Assignee: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Eun Jeong Ko, Hyun Ik Shin, Kee Young Lee, Chang Young Oh
  • Patent number: 10800737
    Abstract: The present invention relates to a cost-effective and efficient method for preparing treprostinil with high purity, and an intermediate therefor.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 13, 2020
    Assignee: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Hyun Ik Shin, Hyoseon Lee, Kyung Jin Lee, Kee Young Lee, Changyoung Oh
  • Publication number: 20200165199
    Abstract: The present invention relates to a process for preparing latanoprostene bunod and an intermediate therefor. In accordance with the preparation process of the present invention, latanoprostene bunod can be efficiently and cost-effectively prepared while reducing side reactions.
    Type: Application
    Filed: August 3, 2018
    Publication date: May 28, 2020
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Eun Jeong KO, Hyun Ik SHIN, Kee Young LEE, Chang Young OH
  • Publication number: 20200129468
    Abstract: An eye drop composition for treating glaucoma is disclosed. The eye drop composition includes a prostaglandin analogue, a thickening agent, and a solubilizing agent, wherein the thickening agent is carboxymethylcellulose or a salt thereof, and the solubilizing agent is tyloxapol.
    Type: Application
    Filed: June 21, 2018
    Publication date: April 30, 2020
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Areum BAEK, Youngsik CHUNG, Hyun Ik SHIN, Chang Young OH, Kee Young LEE
  • Patent number: 10538539
    Abstract: A method for preparing a 3-((2S,5S)-4-methylene-5-(3-oxopropyl)tetrahydrofuran-2-yl)propanol derivative by a simple process with high yields, and an intermediate useful for the method.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: January 21, 2020
    Assignee: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Hyun Ik Shin, Kee Young Lee, Changyoung Oh
  • Patent number: 10532018
    Abstract: A skin whitening method including: administering to a subject a cosmetic composition including a tranexamic acid-peptide having skin whitening activity selected from the group consisting of Tranexamil-AS, Tranexamil-AT, Tranexamil-AP, Tranexamil-GP, Tranexamil-ES, Tranexamil-KK, Tranexamil-HK, Tranexamil-MY, Tranexamil-GH, Tranexamil-MA, Tranexamil-AH, Tranexamil-CC, Tranexamil-SA, Tranexamil-WA, Tranexamil-WE, Tranexamil-KD, Tranexamil-NA, Tranexamil-TS, Tranexamil-SS, Tranexamil-EC, Tranexamil-TA, Tranexamil-PF, Tranexamil-VS, Tranexamil-VV, Tranexamil-VP, Tranexamil-AA, Tranexamil-PS, Tranexamil-HA, Tranexamil-GK, Tranexamil-KV, Tranexamil-AR, Tranexamil-RP, Tranexamil-PQ, Tranexamil-QG, Tranexamil-PP, Tranexamil-VR, Tranexamil-SV, Tranexamil-ET, Tranexamil-CG and Tranexamil-NT.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: January 14, 2020
    Assignee: ANPEP INC.
    Inventors: Sang Moon Kang, Seock Yeon Hwang, Mi Hye Lim, Chung Park, Eun Jin Shin, Kee-young Lee, Un Kyu Park, Hyun Ji Lim, Dong Hyun Yang, Sang Joo Cha
  • Publication number: 20190380943
    Abstract: A skin whitening method including: administering to a subject a cosmetic composition including a tranexamic acid-peptide having skin whitening activity selected from the group consisting of Tranexamil-AS, Tranexamil-AT, Tranexamil-AP, Tranexamil-GP, Tranexamil-ES, Tranexamil-KK, Tranexamil-HK, Tranexamil-MY, Tranexamil-GH, Tranexamil-MA, Tranexamil-AH, Tranexamil-CC, Tranexamil-SA, Tranexamil-WA, Tranexamil-WE, Tranexamil-KD, Tranexamil-NA, Tranexamil-TS, Tranexamil-SS, Tranexamil-EC, Tranexamil-TA, Tranexamil-PF, Tranexamil-VS, Tranexamil-VV, Tranexamil-VP, Tranexamil-AA, Tranexamil-PS, Tranexamil-HA, Tranexamil-GK, Tranexamil-KV, Tranexamil-AR, Tranexamil-RP, Tranexamil-PQ, Tranexamil-QG, Tranexamil-PP, Tranexamil-VR, Tranexamil-SV, Tranexamil-ET, Tranexamil-CG and Tranexamil-NT.
    Type: Application
    Filed: June 29, 2017
    Publication date: December 19, 2019
    Applicant: ANPEP INC.
    Inventors: Sang Moon KANG, Seock Yeon HWANG, Mi Hye LIM, Chung PARK, Eun Jin SHIN, Kee-young LEE, Un Kyu PARK, Hyun Ji LIM, Dong Hyun YANG, Sang Joo CHA
  • Publication number: 20190119205
    Abstract: The present invention relates to a cost-effective and efficient method for preparing treprostinil with high purity, and an intermediate therefor.
    Type: Application
    Filed: April 18, 2017
    Publication date: April 25, 2019
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Hyun Ik SHIN, Hyoseon LEE, Kyung Jin LEE, Kee Young LEE, Changyoung OH
  • Publication number: 20190023727
    Abstract: A method for preparing a 3-((2S,5S)-4-methylene-5-(3-oxopropyl)tetrahydrofuran-2-yl)propanol derivative by a simple process with high yields, and an intermediate useful for the method.
    Type: Application
    Filed: January 13, 2017
    Publication date: January 24, 2019
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Hyun Ik SHIN, Kee Young LEE, Changyoung OH
  • Patent number: 9398395
    Abstract: The disclosure is related to grouping and displaying messages exchanging between a sender and a plurality of recipients. A first message including a first tag may be sent to a plurality of recipient terminals. A second message may be received from at least one of the recipient terminals. The received second message may be grouped into a related message group based on the first tag and a second tag. The second tag may be included in the second message. The received second messages may be displayed within the related message group.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: July 19, 2016
    Assignee: KT CORPORATION
    Inventor: Kee-Young Lee
  • Patent number: 9126898
    Abstract: The present invention relates to a process for preparing a prostaglandin derivative and an intermediate therefor. In accordance with the present invention, the prostaglandin F (PGF) derivative can be efficiently prepared with high purity by removing the protecting group of a protected prostaglandin E (PGE) derivative obtained from conjugate addition and then stereoselectively reducing the ketone group on the cyclopentanone ring of the PGE derivative.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: September 8, 2015
    Assignee: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Changyoung Oh, Kee Young Lee, Yong Hyun Kim, Jae Eun Joo
  • Publication number: 20130253218
    Abstract: The present invention relates to a process for preparing a prostaglandin derivative and an intermediate therefor. In accordance with the present invention, the prostaglandin F (PGF) derivative can be efficiently prepared with high purity by removing the protecting group of a protected prostaglandin E (PGE) derivative obtained from conjugate addition and then stereoselectively reducing the ketone group on the cyclopentanone ring of the PGE derivative.
    Type: Application
    Filed: May 23, 2013
    Publication date: September 26, 2013
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Changyoung OH, Kee Young LEE, Yong Hyun KIM, Jae Eun JOO
  • Publication number: 20120108839
    Abstract: The present invention relates to a process for preparing a prostaglandin derivative and an intermediate therefor. In accordance with the present invention, the prostaglandin F (PGF) derivative can be efficiently prepared with high purity by removing the protecting group of a protected prostaglandin E (PGE) derivative obtained from conjugate addition and then stereoselectively reducing the ketone group on the cyclopentanone ring of the PGE derivative.
    Type: Application
    Filed: March 11, 2010
    Publication date: May 3, 2012
    Applicant: YONSUNG FINE CHEMICAL CO., LTD.
    Inventors: Changyoung Oh, Kee Young Lee, Yong Hyun Kim, Jae Eun Joo
  • Patent number: 6989458
    Abstract: The present invention relates to a process for effectively preparing prostaglanin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: January 24, 2006
    Assignee: Yonsung Fine Chemical Co.
    Inventors: Won-Hun Ham, Chang-Young Oh, Yong-Hyun Kim, Yiu-Suk Lee, Kee-Young Lee
  • Publication number: 20050192451
    Abstract: The present invention relates to a process for effectively preparing prostaglanin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Application
    Filed: December 22, 2004
    Publication date: September 1, 2005
    Inventors: Won-Hun Ham, Chang-Young Oh, Yong-Hyun Kim, Yiu-Suk Lee, Kee-Young Lee
  • Patent number: 6914159
    Abstract: The present invention relates to a novel process for preparing sulfamoyl-substituted phenethylamine derivatives, specifically, 5-{2-[2-(2-alkoxy-phenoxy)ethylamino]-propyl}-2-methoxy-benzene sulfonamide of the formula (1).
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: July 5, 2005
    Assignee: Yonsung Fine Chemical Co., Ltd.
    Inventors: Won Hun Ham, Chang Young Oh, Kee Young Lee, Yong Hyun Kim, Yiu Suk Lee
  • Patent number: 6852880
    Abstract: The present invention relates to a process for effectively preparing prostaglandin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: February 8, 2005
    Assignee: Yonsung Fine Chemical Co.
    Inventors: Won-Hun Ham, Chang-Young Oh, Kee-Young Lee, Yong-Hyun Kim, Yiu-Suk Lee
  • Publication number: 20040116693
    Abstract: The present invention relates to a process for effectively preparing prostaglandin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Application
    Filed: October 24, 2003
    Publication date: June 17, 2004
    Inventors: Won-Hun Ham, Chang-Young Oh, Kee-Young Lee, Yong-Hyun Kim, Yiu-Suk Lee
  • Patent number: 6127546
    Abstract: The present invention relates to a process for the preparation of an oxazoline compound which is easily chemically converted to a beta-amino-alpha-hydroxy acid or a gamma-amino-beta-hydroxy acid. The method comprises producing a compound of the following formula (4) using .alpha.-amino acid. The produced compound (4) is subjected to an intramolecular cyclization to produce an oxazoline compound of the following formula (3). The oxazoline compound (3) is oxidized at a vinyl group with RuCl.sub.3 or NaIO.sub.4 to produce an oxazoline compound of the following formula (1) which is easily chemically converted to a beta-amino-alpha-hydroxy acid. Alternatively, the oxazoline compound (3) may also be treated with 9-borabiclo[3.3.1]nonane such that a hydroxy group is introduced into the end of the vinyl group of the oxazoline compound(3). The introduced end hydroxy group is oxidized with RuCl.sub.3 or NaIO.sub.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: October 3, 2000
    Assignee: Dong Kook Pharmaceutical Co., Ltd.
    Inventors: Jin Kyu Park, Kyung Seok Choi, Han Won Lee, Sung Ki Seo, Won Hun Ham, Chang Young Oh, Kee Young Lee, Yong Hyun Kim, Min Sung Park