Patents by Inventor Philippe Ledon

Philippe Ledon 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).

  • Cosmetic depilatory compositions comprising a continuous aqueous phase and an oil phase
    Patent number: 6306380
    Abstract: The invention provides depilatory compositions comprising: (a) a continuous aqueous phase; (b) a depilatory agent; and (c) at phase comprising (i) a non-polar coil separated from the continuous aqueous phase by a bilayer phase comprising (ii) a surfactant; (iii) a polar substance; wherein the composition is substantially free from tertiary amines; processes for their preparation; and their use degrading hair keratin.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: October 23, 2001
    Assignee: Reckitt & Colman France
    Inventors: Sarah Desmots, Bruno Guillaume, Philippe Ledon, Veronique Pires
  • Depilatory compositions with thixotropic agents
    Patent number: 6203784
    Abstract: A depilatory composition has improved rinsing properties by the inclusion of from 0.25% to 6% of a thixotropic agent and from 5% to 10.5% of fatty materials. Preferred thixotropic agents are smectite clays, bentonites and synthetic nectorite clays.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: March 20, 2001
    Assignee: Reckitt Benckiser France
    Inventors: Georges Martin, Philippe Ledon, Hubert Delagneau