Patents by Inventor Dong Jun Im

Dong Jun Im 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).

  • Hollow fiber membrane and manufacturing method thereof
    Patent number: 11406942
    Abstract: A hollow fiber membrane of the present invention is a hollow fiber membrane having an outer surface and an inner surface, wherein the inner surface has a zebra stripe pattern in which dense portions and porous portions are alternately formed in the longitudinal direction, and the outer surface has a maximum pore size of about 1 ?m or less (?about 1 ?m), and wherein the hollow fiber membrane has a water permeability (flux) of ?about 1,300 LMH/bar to ?about 5,000 LMH/bar.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: August 9, 2022
    Assignee: LOTTE CHEMICAL CORPORATION
    Inventors: Bum Jin Park, Dong Jun Im, Chang Min Seo
  • HOLLOW FIBER MEMBRANE AND MANUFACTURING METHOD THEREOF
    Publication number: 20200360864
    Abstract: A hollow fiber membrane of the present invention is a hollow fiber membrane having an outer surface and an inner surface, wherein the inner surface has a zebra stripe pattern in which dense portions and porous portions are alternately formed in the longitudinal direction, and the outer surface has a maximum pore size of about 1 ?m or less (?about 1 ?m), and wherein the hollow fiber membrane has a water permeability (flux) of ? about 1,300 LMH/bar to ? about 5,000 LMH/bar.
    Type: Application
    Filed: November 22, 2018
    Publication date: November 19, 2020
    Inventors: Bum Jin PARK, Dong Jun IM, Chang Min SEO
  • Hollow fiber membrane and method of preparing the same
    Patent number: 10471395
    Abstract: A hollow fiber membrane and a method of preparing the same. The hollow fiber membrane has an inner surface and an outer surface, wherein the inner surface has a zebra-stripe pattern in which a dense portion and a porous portion are alternately formed in a longitudinal direction of the hollow fiber membrane.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: November 12, 2019
    Assignee: LOTTE CHEMICAL CORPORATION
    Inventors: Dong Jun Im, Bum Jin Park, Chang Min Seo
  • HOLLOW FIBER MEMBRANE AND METHOD OF PREPARING THE SAME
    Publication number: 20180085713
    Abstract: A hollow fiber membrane and a method of preparing the same. The hollow fiber membrane has an inner surface and an outer surface, wherein the inner surface has a zebra-stripe pattern in which a dense portion and a porous portion are alternately formed in a longitudinal direction of the hollow fiber membrane.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 29, 2018
    Applicant: LOTTE CHEMICAL CORPORATION
    Inventors: Dong Jun Im, Bum Jin Park, Chang Min Seo