Patents by Inventor Valerie V. Sheares Ashby

Valerie V. Sheares Ashby 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).

  • pH-sensitive methacrylic copolymers and the production thereof
    Patent number: 7160971
    Abstract: The present invention provides novel multi-functional methacrylic copolymers that exhibit cationic pH-sensitive behavior as well as good water solubility under acidic conditions. The copolymers are constructed from tertiary amine methacrylates and poly(ethylene glycol) containing methacrylates. The copolymers are useful as gene vectors, pharmaceutical carriers, and in protein separation applications.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: January 9, 2007
    Assignee: Iowa State University Research Foundation
    Inventors: Surya K. Mallapragada, Brian C. Anderson, Paul D. Bloom, Valerie V. Sheares Ashby
  • pH-sensitive methacrylic copolymers and the production thereof
    Patent number: 6998456
    Abstract: The present invention provides novel multi-functional methacrylic copolymers that exhibit cationic pH-sensitive behavior as well as good water solubility under acidic conditions. The copolymers are constructed from tertiary amine methacrylates and poly(ethylene glycol) containing methacrylates. The copolymers are useful as gene vectors, pharmaceutical carriers, and in protein separation applications.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: February 14, 2006
    Assignee: Iowa State University Research Foundation
    Inventors: Surya K. Mallapragada, Brian C. Anderson, Paul D. Bloom, Valerie V. Sheares Ashby