Patents by Inventor Neil Campbell Leatherbury

Neil Campbell Leatherbury 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).

  • Lipsticks compositions containing association structures
    Patent number: 6325995
    Abstract: The present invention relates to lipstick compositions which comprise thermodynamically association structures, preferably lamellar liquid crystals and/or reverse hexagonal liquid crystals, which are used to deliver polar solvent/moisturizers through a non-polar (lipophilic) medium. The association structures consist essentially of from about 3% to about 96%, by weight, of polar solvent (e.g. glycerine) and from about 4% to about 97% of surfactant having a Krafft point at or below about ambient temperature.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: December 4, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Magda El-Nokaly, David William Walling, Michael L. Vatter, Neil Campbell Leatherbury
  • Non-sweating lipsticks
    Patent number: 5843407
    Abstract: The present invention relates to lipstick compositions which comprise wax, emollient and a gelling agent wherein the inclusion of the gelling agent facilitates the retention of emollient oils particularly under high humidity and temperatures. Lipsticks of the present invention contain moisturizers which may be delivered to the lips in a non-polar/lipophilic medium in a thermodynamically stable way by using associated structures. A method of making the lipstick is also disclosed.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: December 1, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Magda El-Nokaly, Michael Lee Vatter, David William Walling, Neil Campbell Leatherbury, Cheryl Lynn Peterson