Patents by Inventor Jean Noolandi

Jean Noolandi 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).

  • Interpenetrating polymer network hydrogel
    Patent number: 8821583
    Abstract: A strain-hardened interpenetrating polymer network (IPN) hydrogel is provided. The interpenetrating polymer network hydrogel is based on two different networks. The first network is a non-silicone network of preformed hydrophilic non-ionic telechelic macromonomers chemically cross-linked by polymerization of its end-groups. The second network is a non-silicone network of ionizable monomers. The second network has been polymerized and chemically cross-linked in the presence of the first network and has formed physical cross-links with the first network. An aqueous salt solution having a neutral pH is used to ionize and swell the second network in the interpenetrating polymer network. The swelling of the second network is constrained by the first network, and this constraining effect results in an increase in effective physical cross-links within the interpenetrating polymer network, and, in turn, an increase its elastic modulus.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: September 2, 2014
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: David Myung, Laura Hartmann, Jean Noolandi, Christopher N. Ta, Curtis W. Frank
  • Strain-hardened interpenetrating polymer network hydrogel
    Publication number: 20080269370
    Abstract: A strain-hardened interpenetrating polymer network (IPN) hydrogel is provided. The interpenetrating polymer network hydrogel is based on two different networks. The first network is a non-silicone network of preformed hydrophilic non-ionic telechelic macromonomers chemically cross-linked by polymerization of its end-groups. The second network is a non-silicone network of ionizable monomers. The second network has been polymerized and chemically cross-linked in the presence of the first network and has formed physical cross-links with the first network. An aqueous salt solution having a neutral pH is used to ionize and swell the second network in the interpenetrating polymer network. The swelling of the second network is constrained by the first network, and this constraining effect results in an increase in effective physical cross-links within the interpenetrating polymer network, and, in turn, an increase its elastic modulus.
    Type: Application
    Filed: February 15, 2008
    Publication date: October 30, 2008
    Inventors: David Myung, Laura Hartman, Jean Noolandi, Christopher N. Ta, Curtis W. Frank