Patents by Inventor Lawrence A. LIMJUCO

Lawrence A. LIMJUCO 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).

  • Lithium-selective crown ether, lithium adsorbent using same, and preparation method thereof
    Patent number: 9850226
    Abstract: Disclosed herein are a novel crown ether with bulky and rigid groups and a method for preparing the same. Also provided are a lithium adsorbent comprising the novel crown ether immobilized onto a nanofiber, and a method for preparing the same. The lithium-selective crown ether is synthesized through intermolecular cyclization between a bulky epoxide and a rigid aromatic compound such as 1,2-dihydroxybenzene, and can effectively recover lithium ions. For use as a lithium adsorbent, the novel crown ether with both bulky and rigid subunits is immobilized onto a polymer nanofiber. The crown ether-immobilized polymer nanofibers may be formed into a recyclable membrane.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 26, 2017
    Assignee: MYONGJI UNIVERSITY INDUSTRY AND ACADEMIA COOPERTAION FOUNDATION
    Inventors: Wook-Jin Chung, Lawrence A. Limjuco, Grace M. Nisola, Rey Eliseo C. Torrejos, Eleazer L. Vivas, Hern Kim, Myoung Jun Park, Jeong Gil Seo, Seong-Poong Lee
  • LITHIUM SELECTIVE CROWN ETHER,LITHIUM ADSORBENT USING SAME, AND PREPARATION METHOD THEREOF.
    Publication number: 20160280678
    Abstract: Disclosed herein are a novel crown ether with bulky and rigid groups and a method for preparing the same. Also provided are a lithium adsorbent comprising the novel crown ether immobilized onto a nanofiber, and a method for preparing the same. The lithium-selective crown ether is synthesized through intermolecular cyclization between a bulky epoxide and a rigid aromatic compound such as 1,2-dihydroxybenzene, and can effectively recover lithium ions. For use as a lithium adsorbent, the novel crown ether with both bulky and rigid subunits is immobilized onto a polymer nanofiber. The crown ether-immobilized polymer nanofibers may be formed into a recyclable membrane.
    Type: Application
    Filed: April 30, 2015
    Publication date: September 29, 2016
    Applicant: MYONGJI UNIVERSITY INDUSTRY AND ACADEMIA COOPERATION FOUNDATION
    Inventors: Wook-Jin CHUNG, Lawrence A. LIMJUCO, Grace M. NISOLA, Rey Eliseo C. TORREJOS, Eleazer L. VIVAS, Hern KIM, Myoung Jun PARK, Jeong Gil SEO, Seong-Poong LEE