Patents by Inventor Michael Berthelet

Michael Berthelet 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).

  • Expanded or expansible plastic material for the fabrication of sunk foundry models and sunk models comprised of such material
    Patent number: 6006818
    Abstract: The models comprise an expanded or expansible polymer or copolymer generally used for the fabrication of such models. The polymer or copolymer contains an oxidizing agent comprising a nitroaliphatic compound that accepts expansion without substantial alteration of its oxidizing properties, that does not substantially modify the characteristics of the polymer or copolymer before, during and after expansion, that does not harm the quality of the metal that is cast, and that has a decomposition temperature essentially identical to that of the polymer or copolymer.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: December 28, 1999
    Assignee: Huttenes-Albertus France (S.A.R.L.)
    Inventors: Emmanuel Berthelet, Michael Berthelet, Asita Bhattacharya