Patents by Inventor Cheon Yong Joo

Cheon Yong Joo 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).

  • Multilayered weatherable film for solar cell
    Patent number: 9028952
    Abstract: Disclosed is a multilayered weatherable film for a solar cell, which has superior elongation change rate, strength change rate and haze and thus is suitable for use in a solar cell, and includes a hard layer having a polyester or copolyester polymer resin and a soft layer having polybutylene terephthalate containing polytetramethylene ether glycol, which are regularly or irregularly laminated in a multilayer form.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: May 12, 2015
    Assignee: SKC Co., Ltd.
    Inventors: Heyoung Suk Park, Gwan Hyung Lee, Cheon Yong Joo, Soo Hee Kim
  • DOUBLE WAVELENGTH-REFLECTIVE MULTI-LAYER FILM
    Publication number: 20130017382
    Abstract: A double wavelength-reflective multi-layer film comprising a reflective layer part composed of at least one resin layer A and at least one resin layer B which are alternatively stacked, the resin layers A and B having refractive indexes different from each other and having a standard deviation in the thickness ranging from 6 to 30 nm, wherein the multi-layer film has an f-ratio of 0.01 to 0.99, is capable of reflecting two visible light wavelength regions in the form of one stack.
    Type: Application
    Filed: December 14, 2010
    Publication date: January 17, 2013
    Applicant: SKC CO., LTD
    Inventors: Se Yoon Woo, Gwan-Hyung Lee, Cheon Yong Joo, Hyung Suk Pak, Byoung Kuk Son, Dae Yong Shin
  • MULTILAYERED OPTICAL FILM, AND PREPARATION METHOD THEREOF
    Publication number: 20120207993
    Abstract: A multilayered optical film has a structure in which a first resin layer comprising PEN and a second resin layer comprising PET copolymerized with heterocyclic polyvalent alcohol are alternatively laminated. The multilayered optical film has excellent optical characteristics because of having excellent heat resistance, showing excellent elongation in case of preparation, having low haze, and having a large difference in a refractive index between resin layers.
    Type: Application
    Filed: October 8, 2010
    Publication date: August 16, 2012
    Applicant: SKC CO., LTD
    Inventors: Cheon Yong Joo, Hyung Suk Park, Byoung Kuk Son, Dae Yong Shin
  • MULTILAYERED WEATHERABLE FILM FOR SOLAR CELL
    Publication number: 20110192459
    Abstract: Disclosed is a multilayered weatherable film for a solar cell, which has superior elongation change rate, strength change rate and haze and thus is suitable for use in a solar cell, and includes a hard layer having a polyester or copolyester polymer resin and a soft layer having polybutylene terephthalate containing polytetramethylene ether glycol, which are regularly or irregularly laminated in a multilayer form.
    Type: Application
    Filed: October 6, 2009
    Publication date: August 11, 2011
    Applicant: SKC CO., LTD.
    Inventors: Heyoung Suk Park, Gwan Hyung Lee, Cheon Yong Joo, Soo Hee Kim