Patents by Inventor Vien Toan

Vien Toan 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).

  • Naphthyltriazines as stabilizers for organic material
    Publication number: 20050169859
    Abstract: Novel compounds of formula I are described wherein E corresponds to the formula or to the formula and the radicals R1, R2, R11, R22, R?22, R?33 and R?33 are as defined in claim 1. Compounds of formula I are suitable for stabilising organic material, especially plastics materials, surface-coatings, cosmetic preparations, sun protection agents or photographic material, against damage by light, oxygen and/or heat.
    Type: Application
    Filed: April 4, 2005
    Publication date: August 4, 2005
    Inventors: Vien Toan, Georges Metzger, Thomas Schafer, Stephane Biry, Christophe Bulliard, Dieter Reinehr, Peter Michaelis
  • Naphthyltriazines as stabilizers for organic material
    Publication number: 20050038245
    Abstract: Novel compounds of formula (I) are described, wherein E corresponds to the formula (a) or to the formula (b) and the radicals R1, R2, R11, R22, R?22, R33, and R?33 are as defined in claim 1. Compounds of formula (I) are suitable for stabilising organic material, especially plastics materials, surface-coatings, cosmetic preparations, sun protection agents or photographic material, against damage by light, oxygen and/or heat.
    Type: Application
    Filed: October 10, 2002
    Publication date: February 17, 2005
    Inventors: Vien Toan, Georges Metzger, Thomas Schafer, Stephane Biry, Christophe Bulliard, Dieter Reinehr, Peter Michaelis