Patents by Inventor Woo Young Yang

Woo Young Yang 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: 20110116841
    Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.
    Type: Application
    Filed: July 22, 2009
    Publication date: May 19, 2011
    Applicant: Samsung Fine Chemicals Co., Ltd.
    Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
  • Publication number: 20110076609
    Abstract: Provided are a toner containing a resin having wax properties and a method of preparing the toner. The toner includes a binder resin into which at least one residue of the group consisting of a C8-C60 higher fatty acid residue and a C8-C60 higher alcohol residue is introduced by esterification, a colorant, and at least one additive.
    Type: Application
    Filed: May 19, 2009
    Publication date: March 31, 2011
    Inventors: Dae Il Hwang, Il Sun Hwang, Duck Kyun Ahn, Woo Young Yang
  • Publication number: 20110033207
    Abstract: A toner using an organic solvent-insoluble resin and a method of preparing the same. The toner includes: a binder resin that comprises an organic solvent-insoluble resin and an acid group-containing resin, a coloring agent, and at least one additive, wherein the organic solvent-insoluble resin is a crosslinked polyester resin or a cyclic olefin co-polymer (COC) resin, and the ratio of the organic solvent-insoluble resin to the acid group-containing resin is in the range of 5:95 to 40:60 on a weight basis. The toner can be applied to an electrophotographic imaging apparatus.
    Type: Application
    Filed: March 26, 2009
    Publication date: February 10, 2011
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Duck Kyun Ahn, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim
  • Publication number: 20110028643
    Abstract: A wax-resin compatibilizer, a wax-resin dispersion, and methods of preparing the wax-resin dispersion. The wax-resin dispersion includes a wax, the wax-resin compatibilizer, and a second resin. The wax-resin dispersion may have a high wax content and excellent storage stability.
    Type: Application
    Filed: March 30, 2009
    Publication date: February 3, 2011
    Applicant: Samsung Fine Chemicals Co., Ltd
    Inventors: Dae Il Hwang, Il Sun Hwang, Duck Kyun Ahn, Woo Young Yang
  • Publication number: 20100272471
    Abstract: Provided are an electrophotographic toner and an electrophotographic image forming apparatus using the same. The electrophotographic toner includes: parent toner particles including a binder resin, a colorant, a releasing agent, and a charge control agent; and barium titanate external additives having an average primary particle diameter in the range of about 50 to about 150 nm, an average shape factor (SF1) in the range of about 100 to about 120, a shape factor in the range of about 0.96 to about 1, and an aspect ratio in the range of about 0.89 to about 1, and added to the surface of the parent toner particles.
    Type: Application
    Filed: December 17, 2008
    Publication date: October 28, 2010
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Woo Young Yang, Keon II Kim, Dae II Hwang, Jae Bum Park, II Sun Hwang, Jun-Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
  • Patent number: 7809014
    Abstract: Disclosed herein are devices and methods for communicating full-rate voice data under an ATM protocol. An exemplary device is configured to communicate voice data through a vocoder in a CDMA backbone network using an ATM Adaptation Layer 0 (AAL0) cell-generating system, which is configured to generate an AAL0 cell for each frame of full-rate voice data. In an exemplary embodiment, the device generates AAL0 cells that each comprise (a) 5 bytes of a Header field; (b) 1 byte of a Length field indicating a size of the voice data; (c) 24 bytes of a Voice-Data field containing the voice data; (d) 19 bytes of a Control-Data field containing information for controlling the voice data; (e) 1 byte of an Error-Detection field containing information for detecting an error of the voice data; and (f) 3 bytes of a PAD field for padding data used to exactly fit into the ATM cell.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: October 5, 2010
    Inventors: Woo Young Yang, Moon Seok Baek
  • Publication number: 20100239972
    Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.
    Type: Application
    Filed: October 22, 2008
    Publication date: September 23, 2010
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Dong Won Kim, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
  • Publication number: 20100232837
    Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.
    Type: Application
    Filed: October 22, 2008
    Publication date: September 16, 2010
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD
    Inventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
  • Publication number: 20100216069
    Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.
    Type: Application
    Filed: September 19, 2008
    Publication date: August 26, 2010
    Applicant: Samsung Fine Chemicals Co. LTd
    Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
  • Publication number: 20100098462
    Abstract: A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.
    Type: Application
    Filed: February 20, 2008
    Publication date: April 22, 2010
    Applicant: Samsung Fine Chemicals Co., Ltd.
    Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Jae Bum Park, Il Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
  • Publication number: 20100055599
    Abstract: A method of preparing a toner having a core-shell structure. The method includes: preparing a mixture by mixing a resin with acid groups, a coloring agent and at least one additive with an organic solvent, and neutralizing the acid groups of the resin with a base; forming a micro-suspension solution by adding the mixture to a dispersion medium; forming a toner core by removing the organic solvent from the micro-suspension; and forming a toner complex having a core-shell structure by seed-polymerizing at least one monomer on the surface of the toner core. Thus, the toner that can prevent hot offsets, improve storage stability at a high temperature and improve charge stability against environment changes can be prepared with reduced costs according to the method.
    Type: Application
    Filed: February 20, 2008
    Publication date: March 4, 2010
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD
    Inventors: Woo Young Yang, Keon li Kim, Dae Ii Hwang, Jae Bum Park, Ii Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
  • Patent number: 7179441
    Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: February 20, 2007
    Assignees: Samsung Fine Chemicals Co., Ltd., Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Seon Cheol Park, Jai Joon Lee
  • Publication number: 20040253172
    Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.
    Type: Application
    Filed: August 16, 2004
    Publication date: December 16, 2004
    Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Seon Cheol Park, Jai Joon Lee
  • Publication number: 20040115122
    Abstract: The present invention relates to a method for preparing high quality barium titanate powder by precipitating barium titanyl oxalate with spraying a mixture of an aqueous barium chloride and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid via a nozzle in high speed, which exhibits improved yield with shortened reaction time and optimized stoichiometric mole ratio of barium to titanium, thus suitable materials for multilayer ceramic capacitors, PTC thermistors, resistors, and the like.
    Type: Application
    Filed: February 5, 2004
    Publication date: June 17, 2004
    Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Jai Joon Lee
  • Publication number: 20040104693
    Abstract: A deflection yoke for a cathode ray tube, with reduced weight and volume plus a low cost of manufacture is obtained by making a ferrite core housed in the deflection yoke very light and thin, based on an optimized design obtained through a number of experimental trials.
    Type: Application
    Filed: November 19, 2003
    Publication date: June 3, 2004
    Inventors: Hyung Dal Joo, Woo Young Yang
  • Patent number: 6577082
    Abstract: In a deflection yoke for a braun tube deflecting an electron beam radiated from an electron gun to a screen and including a horizontal deflection coil, a vertical deflection coil and a ferrite core, the horizontal deflection coil is installed inside a funnel, the ferrite core is installed outside of the funnel, the vertical deflection coil is installed inside or outside of the funnel, accordingly the convergence and deflection sensitivity of an electron beam can be easily compensated, the deflection sensitivity of a braun tube can improve, and the degree of freedom in designing the deflection yoke and an electron gun related to enlarging a diameter of the electron gun can increase.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: June 10, 2003
    Assignee: LG Electronics Inc.
    Inventors: Woo Young Yang, Jong Ho Lim, Gyoo Hwan Kim
  • Publication number: 20020060535
    Abstract: In a deflection yoke for a braun tube deflecting an electron beam radiated from an electron gun to a screen and including a horizontal deflection coil, a vertical deflection coil and a ferrite core, the horizontal deflection coil is installed inside a funnel, the ferrite core is installed outside of the funnel, the vertical deflection coil is installed inside or outside of the funnel, accordingly the convergence and deflection sensitivity of an electron beam can be easily compensated, the deflection sensitivity of a braun tube can improve, and the degree of freedom in designing the deflection yoke and an electron gun related to enlarging a diameter of the electron gun can increase.
    Type: Application
    Filed: May 17, 2001
    Publication date: May 23, 2002
    Applicant: LG Electronics Inc.
    Inventors: Woo Young Yang, Jong Ho Lim, Gyoo Hwan Kim