Patents Assigned to Unilever Home & Personal Care USA, Co, division of Conopco, Inc.
  • Toothbrush
    Patent number: 6389636
    Abstract: A toothbrush incorporates an indicator comprising a pressure indicating material which provides an optical signal without the provision of a power supply and wherein the signal is provided when the correct brushing pressure is being applied. Preferably, the pressure sensitive material is a piezochromic material, such as a liquid crystal cholesterol ester.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: May 21, 2002
    Assignee: Unilever Home & Personal Care USA, Co, division of Conopco, Inc.
    Inventor: Derek Guy Savill