Patents by Inventor Wei-Hsang CHANG

Wei-Hsang 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).

  • POROUS DEVICES AND PROCESSES FOR PRODUCING SAME
    Publication number: 20190183626
    Abstract: A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Inventors: Wei-Hsang Chang, Stephen Lee Laffoon, Christopher S.D. Lee, David Lee Safranski
  • Porous devices and processes for producing same
    Patent number: 10231813
    Abstract: A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: March 19, 2019
    Assignee: Vertera, Inc.
    Inventors: Wei-Hsang Chang, Stephen Lee Laffoon, Christopher S. D. Lee, David Lee Safranski
  • POROUS DEVICES AND METHODS OF PRODUCING THE SAME
    Publication number: 20180193125
    Abstract: A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
    Type: Application
    Filed: December 26, 2017
    Publication date: July 12, 2018
    Inventors: Wei-Hsang CHANG, Stephen Lee LAFFOON, Christopher S.D. LEE, David Lee SAFRANSKI
  • POROUS DEVICES AND PROCESSES FOR PRODUCING SAME
    Publication number: 20180193126
    Abstract: A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
    Type: Application
    Filed: December 26, 2017
    Publication date: July 12, 2018
    Inventors: Wei-Hsang CHANG, Stephen Lee LAFFOON, Christopher S.D. LEE, David Lee SAFRANSKI