Patents by Inventor Henri Lievremont

Henri Lievremont 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).

  • Flameproof material or conglomerate
    Patent number: 4070311
    Abstract: An expanded material or conglomerate exhibiting outstanding fire-retardant properties and having an elevated specific weight contains 20 to 80% by weight of a binder constituted by a phenol-formaldehyde resin, 20 to 80% by weight of a gypsum obtained as a by-product in the preparation of phosphoric acid, and possibly inert filler materials which may be constituted by inorganic or organic substances.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: January 24, 1978
    Inventors: Adolphe Cominassi, Henri Lievremont
  • Measuring and mixing process for the manufacture of foamed resins and installation and conglomerates obtained by using them
    Patent number: 4000096
    Abstract: This invention concerns an improved measuring and mixing process and installation, in which the products are circulated by a system operating as a hydropneumatic convertor, and a batcher consisting of a cylinder containing a mobile piston is placed between this circulating system and the mixing tank.It concerns in particular the measuring and mixing of products of widely different viscosities and densities.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: December 28, 1976
    Inventors: Henri Lievremont, Adolphe Cominassi