Patents by Inventor Hwai-Min Tsay

Hwai-Min Tsay 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).

  • Membranes with controlled permeability to polar and apolar molecules in solution and methods of making same
    Patent number: 7871456
    Abstract: A membrane for use in an implantable glucose sensor including at least one crosslinked substantially hydrophobic polymer and at least one crosslinked substantially hydrophilic polymer; wherein the first and second polymers are different polymers and substantially form an interpenetrating polymer network, semi-interpenetrating polymer network, polymer blend, or copolymer. The membranes are generally characterized by providing a permeability ratio of oxygen to glucose of about 1 to about 1000 in units of (mg/dl glucose) per (mmHg oxygen). Three methods of making membranes from hydrophobic and hydrophilic monomers formed into polymer networks are provided, wherein according to at least two of the methods, the monomers may be substantially immiscible with one another.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: January 18, 2011
    Assignee: The Regents of the University of California
    Inventors: David A. Gough, Joseph Y. Lucisano, Joe T. Lin, Hwai-Min Tsay, Drahoslav Lim, Jana Limova, legal representative
  • Membranes with controlled permeability to polar and apolar molecules in solution and methods of making same
    Publication number: 20080034972
    Abstract: A membrane for use in an implantable glucose sensor including at least one crosslinked substantially hydrophobic polymer and at least one crosslinked substantially hydrophilic polymer; wherein the first and second polymers are different polymers and substantially form an interpenetrating polymer network, semi- interpenetrating polymer network, polymer blend, or copolymer. The membranes are generally characterized by providing a permeability ratio of oxygen to glucose of about 1 to about 1000 in units of (mg/dl glucose) per (mmHg oxygen). Three methods of making membranes from hydrophobic and hydrophilic monomers formed into polymer networks are provided, wherein according to at least two of the methods, the monomers may be substantially immiscible with one another.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 14, 2008
    Inventors: David A. Gough, Joseph Y. Lucisano, Joe T. Lin, Hwai-Min Tsay, Drahoslav Lim