Patents by Inventor W. Nigel Powell

W. Nigel Powell 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).

  • Multiphase candle containing locally enriched regions of deliverable actives
    Patent number: 5961967
    Abstract: A candle is provided for delivery of an active ingredient comprising a multiphase construction of a continuous first matrix and a second matrix dispersed therein. The first matrix comprises a thermoplastic material, and the second matrix comprises a thermoplastic material which additionally comprises an active ingredient. The second matrix is a discrete phase of small bodies having size in longest dimension between about 0.05 microns to about 5 mm.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: October 5, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: W. Nigel Powell, Daniel B. Pendergrass, Jr.