Patents by Inventor Dong Yeop Oh

Dong Yeop Oh 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: 11396598
    Abstract: A polybutylene succinate (PBS) nanocomposite material includes a matrix comprising polybutylene succinate chains, and nanocelluloses dispersed between the polybutylene succinate chains. The PBS composite material may be produced by polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses. The PBS nanocomposite material and the method have improved properties, which does not require a surface hydrophobization pretreatment process of cellulose, melt kneading, and solution mixing processes.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: July 26, 2022
    Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Dong Yeop Oh, Jong Geon Jegal, Sung Yeon Hwang, Je Young Park, Tae Ho Kim, Hyeon Yeol Jeon
  • Patent number: 11299578
    Abstract: A self-restoring polyurethane-based polymer obtained by polymerization of a composition containing an aromatic disulfide diol represented by Chemical Formula, HO—Ar1—S—S—Ar2—OH, an alicyclic polyisocyanate, and a polyol. Ar1 and Ar2 each are independently a substituted or unsubstituted C6-C30 arylene group. The composition satisfies Equation, 0.1?M[disulfide]/M[OH]. M[disulfide] is a total mole number of the aromatic disulfide diol in the composition, and M[OH] is a total mole number of the aromatic disulfide diol and the polyol in the composition.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: April 12, 2022
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Sung Yeon Hwang, Jeyoung Park, Dong Yeop Oh, Jong Geon Jegal, Seon Mi Kim, Hyeon Yeol Jeon
  • Publication number: 20220073744
    Abstract: The present invention relates to a polymer composite material comprising an aramid nanofiber (ANF), and a method for preparing same. More specifically, the present invention relates to an arylene ether-based polymer or arylene ether imide-based polymer composite material which is obtained by mixing an arylene ether-based polymer or an arylene ether imide-based polymer with aramid nanofibers dispersed in a polar aprotic solution or by adding and polymerizing monomers in the dispersion of aramid nanofibers.
    Type: Application
    Filed: September 28, 2020
    Publication date: March 10, 2022
    Inventors: Sung Yeon HWANG, Jeyoung PARK, Dong Yeop OH, Hyeon Yeol JEON, Seul A PARK, Young Ho EOM
  • Publication number: 20220064387
    Abstract: Disclosed is a composite film including a nanocellulose film including cellulose nanofibers stacked in a structure including a plurality of pores; and a polycarbonate resin filling the pores in the nanocellulose film and including a repeating unit that comprises a moiety derived from isosorbide.
    Type: Application
    Filed: October 28, 2020
    Publication date: March 3, 2022
    Inventors: Chae Hwan Hong, Jin Woo Choung, Dong Yeop Oh, Seul A Park, Hyeon Yeol Jeon, Jeyoung Park, Sung Yeon Hwang
  • Publication number: 20210238348
    Abstract: The present disclosure relates to a method for preparing an aramid nanofiber dispersion. More specifically, the present invention relates to a method for preparing aramid nanofibers in a short time from aromatic polyamide-based polymers other than fibers, and to aramid nanofibers prepared therefrom.
    Type: Application
    Filed: March 19, 2019
    Publication date: August 5, 2021
    Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Jeyoung PARK, Dong Yeop OH, Sung Yeon HWANG, Hyun Gil CHA, Jong Geon JEGAL, Ho Jun KIM, Seul A PARK
  • Publication number: 20200216660
    Abstract: A polybutylene succinate (PBS) nanocomposite material includes a matrix comprising polybutylene succinate chains, and nanocelluloses dispersed between the polybutylene succinate chains. The PBS composite material may be produced by polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses. The PBS nanocomposite material and the method have improved properties, which does not require a surface hydrophobization pretreatment process of cellulose, melt kneading, and solution mixing processes.
    Type: Application
    Filed: June 20, 2018
    Publication date: July 9, 2020
    Inventors: Dong Yeop OH, Jong Geon JEGAL, Sung Yeon HWANG, Je Young PARK, Tae Ho KIM, Hyeon Yeol JEON
  • Publication number: 20200157271
    Abstract: A self-restoring polyurethane-based polymer obtained by polymerization of a composition containing an aromatic disulfide diol represented by Chemical Formula, HO—Ar1—S—S—Ar2—OH, an alicyclic polyisocyanate, and a polyol. Ar1 and Ar2 each are independently a substituted or unsubstituted C6-C30 arylene group. The composition satisfies Equation, 0.1?M[disulfide]/M[OH]. M[disulfide] is a total mole number of the aromatic disulfide diol in the composition, and M[OH] is a total mole number of the aromatic disulfide diol and the polyol in the composition.
    Type: Application
    Filed: July 11, 2018
    Publication date: May 21, 2020
    Inventors: Sung Yeon HWANG, Jeyoung PARK, Dong Yeop OH, Jong Geon JEGAL, Seon Mi KIM, Hyeon Yeol JEON
  • Patent number: 10053589
    Abstract: The present invention relates to a surface treatment composition for forming a self-assembled coating layer which is easily coated and removed and a surface treatment method, where the self-assembled coating layer can be easily formed because of use of a compound having the hydroxyl groups as a diol are attached to an ortho position of a benzene ring and be removed by treatment of Al3+ or Fe3+. Thus, the surface can be reused by forming a new self-assembled coating layer, thereby making the surface treatment composition be applied to various researches and industrial fields of the self-assembly coating layer which are used for reduction in metal abrasion resistance, introduction of a chemical functional group for detecting a biomolecule, the surface hydrophilicity, introduction of an antifouling property to the surface, and the like.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: August 21, 2018
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Dong Soo Hwang, Jin Hwa Heo, Dong Yeop Oh
  • Publication number: 20170072091
    Abstract: Provided are a bioadhesive hydrogel including surface-treated nanofibers, a preparation method thereof, and use of thereof. The hydrogel including surface-treated nanofibers provided in the present invention may have excellent bioadhesive strength, thereby being widely applied to a bioadhesive, a scaffold for tissue engineering, a carrier for drug delivery, etc.
    Type: Application
    Filed: April 14, 2015
    Publication date: March 16, 2017
    Inventors: Dong Soo HWANG, Dong Yeop OH, Do Hoon LEE, Jaehyuk JUNG
  • Publication number: 20170049669
    Abstract: The present invention relates to a composition for oral application and a method for preparing the same, more particularly, to a composition for oral application comprising a complex of specific Lewis base and specific Lewis acid, and a method for preparing the same. The composition for oral application of the present invention has excellent durability, body stability and coatibility, and thus, can effectively treat dentin hypersensitivity, and when applied before dentin hypersensitivity occurs, can prevent dentin hypersensitivity.
    Type: Application
    Filed: April 29, 2015
    Publication date: February 23, 2017
    Inventors: Dong Soo HWANG, Dong Yeop OH, Jin-Soo AHN, Hyung Joon CHA, Sang-Ho JUN, Sung-Won JU, Ekavianty PRAJATELISTIA
  • Publication number: 20160090489
    Abstract: The present invention relates to a surface treatment composition for forming a self-assembled coating layer which is easily coated and removed and a surface treatment method, where the self-assembled coating layer can be easily formed because of use of a compound having the hydroxyl groups as a diol are attached to an ortho position of a benzene ring and be removed by treatment of Al3+ or Fe3+. Thus, the surface can be reused by forming a new self-assembled coating layer, thereby making the surface treatment composition be applied to various researches and industrial fields of the self-assembly coating layer which are used for reduction in metal abrasion resistance, introduction of a chemical functional group for detecting a biomolecule, the surface hydrophilicity, introduction of an antifouling property to the surface, and the like.
    Type: Application
    Filed: November 26, 2015
    Publication date: March 31, 2016
    Inventors: Dong Soo HWANG, Jin Hwa Heo, Dong Yeop Oh
  • Publication number: 20140242870
    Abstract: The present invention relates to a composite including chitosan and/or chitin and a catechol-based compound, an organic reinforcing material composition including the composite, a product manufactured by using the organic reinforcing material composition, and a method for preparing a chitosan and/or chitin composite with improved strength, including the step of adding the catechol-based compound to chitosan and/or chitin. The chitosan and/or chitin composite including the catechol-based compound is advantageous in that it is able to maintain high strength in a wet-swollen state by improving the problem of strength reduction due to moisture, compared to the composites containing no catechol-based compound.
    Type: Application
    Filed: September 27, 2012
    Publication date: August 28, 2014
    Inventors: Dong Soo Hwang, Dong Yeop Oh, Sang Sik Kim, Hyung Joon Cha
  • Publication number: 20110094587
    Abstract: Provided is a method for controlling a self-assembled structure of a poly(3-hexylthiophene)-based block copolymer, including: providing a polymer composition containing a block copolymer having a ?-conjugated poly(3-hexylthiophene) polymer and a non-conjugated polymer introduced thereto, and a solvent; and coating the polymer composition onto a substrate. According to the method disclosed herein, it is possible to control a self-assembled structure of a poly(3-hexylthiophene)-based block copolymer merely by a relatively simple process including coating the poly(3-hexylthiophene)-based block copolymer onto a substrate with a selected solvent. In this manner, it is possible to control the alignment of conductive domains in the block copolymer so that it is suitable for various organic electronic devices.
    Type: Application
    Filed: February 17, 2010
    Publication date: April 28, 2011
    Applicant: Korea Institute of Science & Technology
    Inventors: Kyung Youl BAEK, Hoichang Yang, Seung Sang Hwang, Yeon Hee Choi, Yun-Jae Lee, Dong Yeop Oh, Han Sup Lee
  • Patent number: 6611989
    Abstract: A vacuum cleaner has a case including a dust chamber filtering dust included in air, an appliance chamber sucking the filtered air from the dust chamber and discharging the air through a discharge port, and a cord chamber storing a wound electrical cord. A fan motor assembly is installed inside the appliance chamber of the case for forcedly sucking the air inside the appliance chamber and discharging the air. An exhaust duct is installed between the fan motor assembly and the discharge port in the case and guiding the air discharged from the fan motor assembly to the discharge port, and a flowing passage is disposed between the dust chamber and the cord chamber so that the air is able to flow therein, whereby overheating of case and of the electrical cord can be prevented and the durability and reliability of the cleaner can be enhanced.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: September 2, 2003
    Assignee: LG Electronics Inc.
    Inventors: Dong Yeop Oh, Sang Wook Hong, Yong Dol Park
  • Publication number: 20020032947
    Abstract: A vacuum cleaner has a case including a dust chamber filtering dust included in air, an appliance chamber sucking the filtered air from the dust chamber and discharging the air through a discharge port, and a cord chamber storing a wound electrical cord. A fan motor assembly is installed inside the appliance chamber of the case for forcedly sucking the air inside the appliance chamber and discharging the air. An exhaust duct is installed between the fan motor assembly and the discharge port in the case and guiding the air discharged from the fan motor assembly to the discharge port, and a flowing passage is disposed between the dust chamber and the cord chamber so that the air is able to flow therein, whereby overheating of case and of the electrical cord can be prevented and the durability and reliability of the cleaner can be enhanced.
    Type: Application
    Filed: August 6, 2001
    Publication date: March 21, 2002
    Inventors: Dong Yeop Oh, Sang Wook Hong, Yong Dol Park
  • Patent number: 6116061
    Abstract: A washing machine includes an outer tub, an inner tub, fluid nozzle configured to spray fluid into the inner tub, a fluid pump, and a controller. The washing machine may also include a pulsator located in the inner tub for applying a force to clothing in inner tub. During a first washing cycle, the controller causes the inner tub to rotate, and the nozzle to spray fluid onto clothing in the inner tub. During the first washing cycle, a fluid level in the outer tub may be controlled so that it is lower than the inner tub. During a second washing cycle, the inner tub is held stationary, and the pulsator applies a force to clothing in the inner tub, as occurs in conventional washing machines. Because the fluid level in the washing machine can be kept quite low during the first washing cycle, less water and less detergent is required. Also, because the level of the water is kept below the rotating inner tub during the first washing cycle, less force and thus less energy are required to rotate the inner tub.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: September 12, 2000
    Assignee: LG Electronics Inc.
    Inventors: Dong Yeop Oh, Kyeong Hwan Kim
  • Patent number: 5857362
    Abstract: Centrifigal washing machine is disclosed, in which a small sized detergent solution spray pump can be used for reducing power, water and detergent consumptions, including an outer tub supported in a body of the washing machine, an inner tub rotatably held in the outer tub, a spray device rotatably held at a center of the inner tub and having a detergent solution spray hole with a narrow width and a long length and an end bent to one side, a detergent solution supply tube connected between an under side of the outer tub and one end of the spray device for guiding a detergent solution filled in the outer tub to the spray device, a pump fitted in the detergent solution supply tube for pumping the detergent solution, a first valve and a second valve fitted at an inlet and an outlet of the detergent solution supply tube respectively for opening and closing the detergent solution supply tube selectively, and a foam eliminating means for eliminating foam produced as the detergent solution is circulated when the pump
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: January 12, 1999
    Assignee: L.G. Electronics Inc.
    Inventors: Dong Yeop Oh, Kyung Seop Hong, Oh Hun Kwon, Kyeong Hwan Kim
  • Patent number: 5661988
    Abstract: A washing net attaching and detaching structure of a fully automatic washing machine with a washing course of dry-marked clothes is shaped as a basket which is attachably and detachably installed within a washtub for being vibrated in the up and down directions in accordance with a reciprocal ascending and descending movement of a driving member to preserve and wash laundry indicated with a dry mark. The washing net has a diameter smaller than an inner circumference of an upper end of the washtub for being easily attached and detached to and from the washtub during the cleaning of dry-marked clothes to provide a convenience to a user and prevent damage to the laundry caused by the laundry being bitten in the lower portion of the washing net, thereby significantly improving the efficiency and reliability of the product.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: September 2, 1997
    Assignee: LG Electronics Inc.
    Inventors: Dong Yeop Oh, Gyu Sang Choe, Kyung Seop Hong, Kyung Hwan Kim, Oh Hun Kwon
  • Patent number: 5657651
    Abstract: A washing apparatus of a fully automatic washing machine incorporated with a washing course of dry-marked clothes includes a motor shaft installed to a motor mounted to an outer tub for being rotated by the driving of the motor, a driving member coupled with the motor shaft for reciprocally ascending and descending together with the rotational movement of the motor shaft, and a washing net joined to the driving member for being vibrated in up and down directions in accordance with the reciprocal ascending and descending movement of the driving member to preserve and clean the laundry indicated with the dry mark, in which the driving member is installed to the center of a washing blade and inserted with the washing net. Thus, the washing net housing with the laundry thereon is vibrated in up and down directions while the driving member reciprocally ascends and descends along with the driving of the motor.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: August 19, 1997
    Assignee: LG Electronics Inc.
    Inventors: Dong Yeop Oh, Gyu Sang Choe, Kyung Seop Hong, Kyung Hwan Kim, Oh Hun Kwon