Patents by Inventor Emmanuel Marchal

Emmanuel Marchal 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).

  • Method for controlled polymerization of o-carboxy anhydrides derived from ?-hydroxy acids
    Patent number: 7528211
    Abstract: The invention concerns a method for preparing poly(-hydroxy acids), the polymerization reaction being performed in controlled manner in the presence of a catalytic system including a base, said base being a 5- or 6-membered aromatic heterocycle comprising at least one endocyclic nitrogen atom, provided that when the base is used alone in the catalytic system, it does not represent pyridine, 2-methylpyridine, 2,6-dimethylpyridine or 2-methoxypyridine. The invention also concerns poly(-hydroxy acids) of formula (IV). Finally, the invention concerns the use of a poly(-hydroxy acid), obtainable by the inventive method, for vectoring active principles or for making biomaterials.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: May 5, 2009
    Assignees: Isochem, Centre de la Recherche Scientifique (CNRS), Universite Paul Sabatier Toulouse III
    Inventors: Didier Bourissou, Olivier Thillaye Du Boullay, Emmanuel Marchal, Bianca Martin-Vaca
  • Method for controlled polymerization of o-carboxy anhydrides derived from alpha-hydroxy acids
    Publication number: 20070249654
    Abstract: The invention concerns a method for preparing poly(-hydroxy acids), the polymerization reaction being performed in controlled manner in the presence of a catalytic system including a base, said base being a 5- or 6-membered aromatic heterocycle comprising at least one endocyclic nitrogen atom, provided that when the base is used alone in the catalytic system, it does not represent pyridine, 2-methylpyridine, 2,6-dimethylpyridine or 2-methoxypyridine. The invention also concerns poly(-hydroxy acids) of formula (IV). Finally, the invention concerns the use of a poly(-hydroxy acid), obtainable by the inventive method, for vectoring active principles or for making biomaterials.
    Type: Application
    Filed: April 6, 2007
    Publication date: October 25, 2007
    Inventors: Didier Bourissou, Olivier Thillaye Du Boullay, Emmanuel Marchal, Bianca Martin-Vaca