Patents by Inventor Hwoing-woon LEE

Hwoing-woon 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).

  • Patent number: 10437164
    Abstract: A toner for developing an electrostatic image including a binder resin, a coloring agent, and a releasing agent are provided. A particle of the toner satisfies conditions of Equation (1) (W(L)/T(L)?0.1 and Equation (2) 15<Nstain, where Nstain refers to a number of stained releasing agent domains when the particle of the toner is stained with ruthenium tetraoxide (RuO4) and a cross section of the particle of the toner is observed, W(L) refers to a longest length of lengths of the stained releasing agent domains, and T(L) refers to a longest length of the cross section of the particles of the toner.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: October 8, 2019
    Assignee: HP PRINTING KOREA CO., LTD.
    Inventors: Jin-mo Hong, Young-jae Kwon, Hwoing-woon Lee
  • Publication number: 20170115585
    Abstract: A toner for developing an electrostatic image including a binder resin, a coloring agent, and a releasing agent are provided. A particle of the toner satisfies conditions of Equation (1) (W(L)/T(L)?0.1 and Equation (2) 15<Nstain, where Nstain refers to a number of stained releasing agent domains when the particle of the toner is stained with ruthenium tetraoxide (RuO4) and a cross section of the particle of the toner is observed, W(L) refers to a longest length of lengths of the stained releasing agent domains, and T(L) refers to a longest length of the cross section of the particles of the toner.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 27, 2017
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jin-mo HONG, Young-jae KWON, Hwoing-woon LEE
  • Patent number: 9182693
    Abstract: A toner to develop an electrostatic charge image, the toner including at least a binder resin, a colorant, and a releasing agent, wherein a weight average molecular weight of the toner measured by using a gel permeation chromatography (GPC) method on a tetrahydrofuran (THF) soluble fraction is in a range of about 30,000 to about 80,000 g/mol, wherein a molecular weight distribution curve of the toner obtained by using the GPC method on the THF soluble fraction has at least one peak in a molecular weight range of 100 to 1,000 g/mol, a peak in a molecular weight range of 1,000 to 5,000 g/mol, and a main peak in a molecular weight range of 5,000 to 20,000 g/mol, a method of preparing the toner, a device to supply the toner, and an apparatus and method of forming an image by using the toner. The toner has more than certain levels of low-temperature fixability, an anti-hot-offset property, a charging ability, a gloss property, and a heat storage ability.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: November 10, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Takeshi Yoshida, Sung-jin Park, Yo-da Shin, Hwoing-woon Lee, Jin-mo Hong
  • Publication number: 20130236827
    Abstract: A toner to develop an electrostatic charge image, the toner including at least a binder resin, a colorant, and a releasing agent, wherein a weight average molecular weight of the toner measured by using a gel permeation chromatography (GPC) method on a tetrahydrofuran (THF) soluble fraction is in a range of about 30,000 to about 80,000 g/mol, wherein a molecular weight distribution curve of the toner obtained by using the GPC method on the THF soluble fraction has at least one peak in a molecular weight range of 100 to 1,000 g/mol, a peak in a molecular weight range of 1,000 to 5,000 g/mol, and a main peak in a molecular weight range of 5,000 to 20,000 g/mol, a method of preparing the toner, a device to supply the toner, and an apparatus and method of forming an image by using the toner. The toner has more than certain levels of low-temperature fixability, an anti-hot-offset property, a charging ability, a gloss property, and a heat storage ability.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Takeshi YOSHIDA, Sung-jin PARK, Yo-da SHIN, Hwoing-woon LEE, Jin-mo HONG