Patents by Inventor Noel Seunghyun Ha

Noel Seunghyun Ha 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).

  • Volumetric micro-injector for capillary electrophoresis
    Patent number: 11209390
    Abstract: A volumetric microfluidic injector for capillary electrophoresis (CE) for highly repeatable sample injection has been designed and built to eliminate known injection bias in hydrodynamic injection. A defined volume from 1-10 nL or 0.1-100 nL of sample is confined in a defined region of a micro-valve PDMS microfluidic injector chip and electrophoretic potential is applied to drive sample into a separation device such as an embedded fused silica capillary for separation and detection. Using a 75 ?m ID capillary, the RSD of an absorbance peak area as low as 1.32% (n=11) is obtained. As a comparison, the time-dependent injection was tested using the same chip which resulted in an inferior repeatability.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: December 28, 2021
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Noel Seunghyun Ha, R. Michael Van Dam, Jimmy Ly
  • VOLUMETRIC MICRO-INJECTOR FOR CAPILLARY ELECTROPHORESIS
    Publication number: 20200041451
    Abstract: A volumetric microfluidic injector for capillary electrophoresis (CE) for highly repeatable sample injection has been designed and built to eliminate known injection bias in hydrodynamic injection. A defined volume from 1-10 nL or 0.1-100 nL of sample is confined in a defined region of a micro-valve PDMS microfluidic injector chip and electrophoretic potential is applied to drive sample into a separation device such as an embedded fused silica capillary for separation and detection. Using a 75 ?m ID capillary, the RSD of an absorbance peak area as low as 1.32% (n=11) is obtained. As a comparison, the time-dependent injection was tested using the same chip which resulted in an inferior repeatability.
    Type: Application
    Filed: October 6, 2017
    Publication date: February 6, 2020
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Noel Seunghyun Ha, R. Michael Van Dam, Jimmy Ly