Patents by Inventor Roland Raynaud

Roland Raynaud 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 obtaining dimethyl terephthalate from polyester scrap
    Patent number: 4163860
    Abstract: A process is disclosed for converting a bis-(diol) terephthalate to dimethyl terephthalate, by interchange in a methanol medium in the presence of magnesium methylate as catalyst. In this way dimethyl terephthalate may be regenerated from scrap of polyterephthalate or copolyterephthalate filaments or films, for the purpose of manufacturing fresh polyterephthalates or copolyterephthalates which can then be used for the manufacture of, for example, filaments or films.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: August 7, 1979
    Assignee: Rhone-Poulenc-Textile
    Inventors: Jacques Delattre, Roland Raynaud, Claude Thomas