Patents Examined by George R. Del Cotto
  • Color safe laundry methods employing zwitterionic formulation components
    Patent number: 6821935
    Abstract: The present invention relates to zwitterionic organic catalyst compound bleach systems and methods for using such bleach systems to increase color safety during laundering of fabrics, especially colored fabrics.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: November 23, 2004
    Assignee: Procter & Gamble Company
    Inventors: Robert Richard Dykstra, Patti Jean Kellett