Patents Examined by Alan Rotman
  • Chemical compositions for inhibiting nitrosation reaction in toiletries and cosmetics
    Patent number: 5807542
    Abstract: Iminium ion scavengers are used in the invention to inhibit formation of N-nitrosamines, especially in cosmetics and pharmaceuticals formulations. The iminium ion scavengers may be used in combination with nitrite ion scavengers such as ascorbate.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: September 15, 1998
    Assignee: Knoll Aktiengesellschaft
    Inventors: Brian Christopher Challis, Walter Graham Guthrie, David Vincent Roper, David Frank Trew