Patents by Inventor Rene Massart

Rene Massart 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).

  • Material based on an electronic conductive polymer incorporating magnetic particles and its production process
    Patent number: 5264157
    Abstract: The invention relates to an electricity conducting material having magnetic properties constituted by an electronic conductive polymer in which are homogeneously dispersed permanent magnetic particles bonded chemically or physicochemically to the polymer or serving as a polymer dopant.This material can be prepared by the polymerizationa) of a monomer such as pyrrole in the presence of a colloidal suspension of charged magnetic particles, orb) a monomer such as pyrrole, chemically bonded to a magnetic particle.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: November 23, 1993
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Gerard Bidan, Sylvie Chardon, Etienne Hannecart, Rene Massart
  • Magnetic fluids and process for obtaining them
    Patent number: 4329241
    Abstract: New ferrofluids.They consist essentially of an aqueous sol of polyoxyanions of Fe(III) and at least one metal of oxidation degree II from the first series of transition metals, with an associated cation, notably selected from H.sup.+,N (CH.sub.3).sub.4.sup.+ and N(C.sub.2 H.sub.5).sub.4.sup.+.Application for example for obtaining levitation or self-sustentation systems, as well as for forming contactors or rotating paths.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: May 11, 1982
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventor: Rene Massart