Patents Assigned to Cooper S.A.
  • Toothpaste permitting of controlling the tooth brushing time
    Patent number: 4150106
    Abstract: This toothpaste contains reagents for controlling the tooth brushing time by the change in color occurring after a predetermined brushing time. It contains essentially a citrate/citric acid buffer having a molarity of 0.07 to 0.35 M and a pH of 4 to 5.5 in the proportion of 10 to 50%, and chlorophenol red in the proportion of 0.02 to 0.1%.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: April 17, 1979
    Assignee: Cooper S.A.
    Inventors: Jacques Assal, Bernard Blanc, Bernard Monnerat