Patents by Inventor Lawrence R. Nilssen

Lawrence R. Nilssen 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).

  • Transdermal drug delivery systems containing quaternary ammonium salts and methods of using the same
    Publication number: 20030091620
    Abstract: A transdermal drug delivery system is disclosed, which includes a polymer, a drug and an amount of a quaternary ammonium salt that is sufficient to act as a penetration enhancer. The quaternary ammonium salt may also be present in an amount sufficient to act as an irritation reducer. Further, the transdermal drug delivery system may also contain a co-enhancer, which provides a synergistic skin permeation enhancing effect when combined with the quaternary ammonium salt. A method for enhancing the transdermal delivery of a drug is also disclosed.
    Type: Application
    Filed: March 21, 2002
    Publication date: May 15, 2003
    Inventors: David Fikstad, Charles D. Ebert, Srinivasan Venkateshwaran, Lawrence R. Nilssen