Patents by Inventor Diane Routzahn

Diane Routzahn 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).

  • Encapsulation of personal care actives
    Patent number: 9278055
    Abstract: Described are methods for encapsulating a personal care active, comprising preparing an aqueous phase, comprising partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant, preparing an oil phase, comprising the personal care active and isocyanate or polyisocyanate, homogenizing the aqueous phase and oil phase to form an emulsion with particles less than one micron, and forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: March 8, 2016
    Assignees: Dow Global Technologies LLC, Rohm and Haas Chemicals LLC
    Inventors: Fanwen Zeng, Charles Jones, Diane Routzahn, Stephen L. Wilson
  • ENCAPSULATION OF PERSONAL CARE ACTIVES
    Publication number: 20140271752
    Abstract: Described are methods for encapsulating a personal care active, comprising preparing an aqueous phase, comprising partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant, preparing an oil phase, comprising the personal care active and isocyanate or polyisocyanate, homogenizing the aqueous phase and oil phase to form an emulsion with particles less than one micron, and forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution.
    Type: Application
    Filed: October 16, 2012
    Publication date: September 18, 2014
    Inventors: Fanwen Zeng, Charles Jones, Diane Routzahn, Stephen L. Wilson