Patents by Inventor Hubert de Rancourt

Hubert de Rancourt 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).

  • Heat-superstabilized semi-finished products containing thermoplastics resin
    Patent number: 4935290
    Abstract: This heat-superstabilized semi-finished product containing thermoplastic resin is constituted of at least two layers: at least one surface layer S designed to be exposed to a source of heat and at least one other layer C which is not directly exposed to said source of heat, said layer S having an overall content by weight of stabilizer which is between 3 and 30 times greater than that of layer C, and said layer S having a surface density between 50 and 600 g.m..sup.-2.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: June 19, 1990
    Inventors: Hubert de Rancourt, Xavier Gambert