Patents by Inventor Pascal Mettvier

Pascal Mettvier 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).

  • Process for treating a material comprising a polymer by hydrolysis
    Patent number: 5905168
    Abstract: Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous grouping and transforming the hydrolyzed compounds into diacids. The treatment of a polyamide 6.6 results in the recovery of adipic acid and other diacids corresponding to the participating acid monomer and to the transformation of at least one part of the diamine monomer into diacids.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: May 18, 1999
    Assignee: Rhone-Poulenc Chimie
    Inventors: Emmanuel Dos Santos, Pascal Mettvier, Michel Gubelmann