Patents by Inventor David A. Tirrell

David A. Tirrell 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).

  • Photosensitive phospholipid vesicles
    Patent number: 4833061
    Abstract: Photosensitive compositions having surfactant vesicles therein are described. A method is also shown in which the photosensitive vesicle containing an enclosed substance is exposed to light to control the release of the substance.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: May 23, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: David A. Tirrell