Patents by Inventor Tae Hoo Chang

Tae Hoo Chang 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).

  • Publication number: 20250145735
    Abstract: The present disclosure generally relates to a process for manufacturing a processable dried cellulose nanomaterial using a co-solvent of tert-butyl alcohol (TBA), of which unique physical/chemical properties enable facile modification/derivatization. This present disclosure also relates to materials and process of generating of superhydrophobic surface coating using hydrophobic carboxylic acid modified cellulose nanofibers. Both the processes and the products thereof are within the scope of this disclosure.
    Type: Application
    Filed: January 7, 2025
    Publication date: May 8, 2025
    Inventors: Alexander Wei, Tae Hoo Chang, Miran Mavlan
  • Patent number: 12195560
    Abstract: The present disclosure generally relates to a process for manufacturing a processable dried cellulose nanomaterial using a co-solvent of tert-butyl alcohol (TBA), of which unique physical/chemical properties enable facile modification/derivatization. This present disclosure also relates to materials and process of generating of superhydrophobic surface coating using hydrophobic carboxylic acid modified cellulose nanofibers. Both the processes and the products thereof are within the scope of this disclosure.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: January 14, 2025
    Assignee: Purdue Research Foundation
    Inventors: Alexander Wei, Tae Hoo Chang, Miran Mavlan
  • Patent number: 12075564
    Abstract: Electronic textiles and methods of fabrication electronic textiles. Nanoparticles of a conductive material are sprayed along a conductive path into a fabric material so as to penetrate into the fabric. A layer of a second conductor material is coated over the nanoparticles along the conductive path. A layer of an insulator material is coated over the layer of the second conductor material so as to encapsulate the conductive path and form a trace. An electrode configured to contact a subject wearing the fabric material includes a layer of a third conductor material coated over the layer of the second conductor and electrically coupled with the conductive path. An electrical connector is secured to the fabric material and electrically coupled with the conductive path. The nanoparticles are sprayed onto the fabric material using a dual regime spray process implemented with a dual regime spray system.
    Type: Grant
    Filed: August 29, 2022
    Date of Patent: August 27, 2024
    Assignee: Purdue Research Foundation
    Inventors: Chi Hwan Lee, Laurent Couetil, Tae Hoo Chang, Semih Akin, Martin Byung-Guk Jun
  • Publication number: 20230136666
    Abstract: Electronic textiles and methods of fabrication electronic textiles. Nanoparticles of a conductive material are sprayed along a conductive path into a fabric material so as to penetrate into the fabric. A layer of a second conductor material is coated over the nanoparticles along the conductive path. A layer of an insulator material is coated over the layer of the second conductor material so as to encapsulate the conductive path and form a trace. An electrode configured to contact a subject wearing the fabric material includes a layer of a third conductor material coated over the layer of the second conductor and electrically coupled with the conductive path. An electrical connector is secured to the fabric material and electrically coupled with the conductive path. The nanoparticles are sprayed onto the fabric material using a dual regime spray process implemented with a dual regime spray system.
    Type: Application
    Filed: August 29, 2022
    Publication date: May 4, 2023
    Inventors: Chi Hwan Lee, Laurent Couetil, Tae Hoo Chang, Semih Akin, Martin Byung-Guk Jun
  • Publication number: 20220213228
    Abstract: The present disclosure generally relates to a process for manufacturing a processable dried cellulose nanomaterial using a co-solvent of tert-butyl alcohol (TBA), of which unique physical/chemical properties enable facile modification/derivatization. This present disclosure also relates to materials and process of generating of superhydrophobic surface coating using hydrophobic carboxylic acid modified cellulose nanofibers. Both the processes and the products thereof are within the scope of this disclosure.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 7, 2022
    Applicant: Purdue Research Foundation
    Inventors: Alexander Wei, Tae Hoo Chang, Miran Mavlan