Patents by Inventor Eun Hye SONG

Eun Hye SONG 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).

  • Piezoelectric material comprising poly(D-lactic acid)/poly(L-lactic acid) stereocomplex crystals
    Patent number: 10305021
    Abstract: Disclosed is a piezoelectric material including stereocomplex crystals of poly(D-lactic acid) (PDLA) and poly(L-lactic acid) (PLLA), wherein poly(D-lactic acid) and poly(L-lactic acid) are crystallized into a stereocomplex, thus exhibiting superior heat resistance and piezoelectric properties. This piezoelectric material, which is obtained using poly(lactic acid), can be produced at very low cost compared to when using PVDF, and is configured to include stereocomplex crystals of PDLA and PLLA and can thus manifest high thermal stability and piezoelectric properties, compared to when using conventional PLLA alone. Such a piezoelectric material can be efficiently utilized in a variety of fields in which low production cost, high processing temperature in the manufacturing process, or high-temperature stability of piezoelectric material products is required.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: May 28, 2019
    Assignee: University-Industry Cooperation Group of Kyung Hee University
    Inventors: Kap Jin Kim, Eun Hye Song
  • PIEZOELECTRIC MATERIAL COMPRISING POLY(D-LACTIC ACID)/POLY(L-LACTIC ACID) STEREOCOMPLEX CRYSTALS
    Publication number: 20170179370
    Abstract: Disclosed is a piezoelectric material including stereocomplex crystals of poly(D-lactic acid) (PDLA) and poly(L-lactic acid) (PLLA), wherein poly(D-lactic acid) and poly(L-lactic acid) are crystallized into a stereocomplex, thus exhibiting superior heat resistance and piezoelectric properties. This piezoelectric material, which is obtained using poly(lactic acid), can be produced at very low cost compared to when using PVDF, and is configured to include stereocomplex crystals of PDLA and PLLA and can thus manifest high thermal stability and piezoelectric properties, compared to when using conventional PLLA alone. Such a piezoelectric material can be efficiently utilized in a variety of fields in which low production cost, high processing temperature in the manufacturing process, or high-temperature stability of piezoelectric material products is required.
    Type: Application
    Filed: June 13, 2016
    Publication date: June 22, 2017
    Applicant: University-Industry Cooperation Group of Kyung Hee University
    Inventors: Kap Jin KIM, Eun Hye SONG