Patents by Inventor Joo-Woon Lee

Joo-Woon Lee 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).

  • Low-temperature pyrolysis of organic acid salts providing graphene rich carbons
    Patent number: 10968105
    Abstract: Methods of pyrolytically producing carbons comprising graphene sheets at temperatures below 800° C. are disclosed. The graphene sheets, which are not substantially stacked, are formed by templating on hexagonal metal oxides, for example. Extensive stacking of the graphene sheets, which would lead to formation of graphite, is avoided at the low temperatures employed. Also provided are methods of producing heavily nitrogen doped graphene comprising carbons. Methods of using graphene and heavily nitrogen doped graphene are also disclosed.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: April 6, 2021
    Assignee: Board of Regents, The University of Texas System
    Inventors: Adam Heller, Joo-Woon Lee, David Eisenberg, Keith A. Friedman, Sheryl Coffman
  • LOW-TEMPERATURE PYROLYSIS OF ORGANIC ACID SALTS PROVIDING GRAPHENE RICH CARBONS
    Publication number: 20200299136
    Abstract: Methods of pyrolytically producing carbons comprising graphene sheets at temperatures below 800° C. are disclosed. The graphene sheets, which are not substantially stacked, are formed by templating on hexagonal metal oxides, for example. Extensive stacking of the graphene sheets, which would lead to formation of graphite, is avoided at the low temperatures employed. Also provided are methods of producing heavily nitrogen doped graphene comprising carbons. Methods of using graphene and heavily nitrogen doped graphene are also disclosed.
    Type: Application
    Filed: March 28, 2017
    Publication date: September 24, 2020
    Applicant: Board of Regents, The University of Texas System
    Inventors: Adam Heller, Joo-Woon Lee, David Eisenberg, Keith A. Friedman, Sheryl Coffman
  • DATA STORAGE DEVICE AND OPERATING METHOD THEREOF
    Publication number: 20140089356
    Abstract: A data storage device may include a logical space suitable for storing a file and a slack space suitable for storing a meta data corresponding to the file.
    Type: Application
    Filed: September 25, 2013
    Publication date: March 27, 2014
    Applicant: SK hynix Inc.
    Inventor: Joo-Woon LEE
  • Method for testing the degradation of polymeric materials
    Patent number: 6864090
    Abstract: The present invention provides a novel method for monitoring the reaction kinetics of the biodegradable polymers, and the surface concentration of a drug in a polymer blend matrix. Detailed information on surface concentration, degradation rates, degradation kinetics and mechanism, is provided by using Time-of-Flight Secondary Ion Mass Spectrometry (ToF SIMS) measurements. Also provided is a method for determining oligomers in hydrolyzed biodegradable polymers.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: March 8, 2005
    Assignee: Research Foundation of State University of New York at Buffalo
    Inventors: Joseph A. Gardella, Jr., Jiaxing Chen, Norma L. Hernandez de Gatica, Joo-Woon Lee
  • Method for testing the degradation of polymeric materials
    Publication number: 20040203161
    Abstract: The present invention provides a novel method for monitoring the reaction kinetics of the biodegradable polymers, and the surface concentration of a drug in a polymer blend matrix. Detailed information on surface concentration, degradation rates, degradation kinetics and mechanism, is provided by using Time-of-Flight Secondary Ion Mass Spectrometry (ToF SIMS) measurements. Also provided is a method for determining oligomers in hydrolyzed biodegradable polymers.
    Type: Application
    Filed: October 21, 2003
    Publication date: October 14, 2004
    Inventors: Joseph A. Gardella, Jiaxing Chen, Norma L. Hernandez de Gatica, Joo-Woon Lee
  • Method for testing the degradation of polymeric materials
    Patent number: 6670190
    Abstract: The present invention provides a novel method for monitoring the surface concentration of a drug in a polymer blend matrix and the reaction kinetics of the biodegradable polymers. Detailed information on surface concentration, degradation rates, degradation kinetics and mechanism, is provided by using Time-of-Flight Secondary Ion Mass Spectrometry (ToF SIMS) measurements. Also provided is a method for determining oligomers in hydrolyzed biodegradable polymers.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: December 30, 2003
    Assignee: The Research Foundation of State University of New York
    Inventors: Joseph A. Gardella, Jr., Jiaxing Chen, Norma L. Hernandez de Gatica, Joo-Woon Lee
  • Method for testing the degradation of polymeric materials
    Publication number: 20030157722
    Abstract: The present invention provides a novel method for monitoring the surface concentration of a drug in a polymer blend matrix and the reaction kinetics of the biodegradable polymers. Detailed information on surface concentration, degradation rates, degradation kinetics and mechanism, is provided by using Time-of-Flight Secondary Ion Mass Spectrometry (ToF SIMS) measurements. Also provided is a method for determining oligomers in hydrolyzed biodegradable polymers.
    Type: Application
    Filed: April 7, 2003
    Publication date: August 21, 2003
    Inventors: Joseph A. Gardella, Jiaxing Chen, Norma L. Hernandez de Gatica, Joo-Woon Lee