Patents by Inventor Jean L. Vidal

Jean L. Vidal 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).

  • Copolymerization of ethylene and an alpha-olefin having 6 carbon atoms in a fluidized bed
    Patent number: 4642328
    Abstract: Process for the preparation of copolymers of ethylene and an alpha-olefin having 6 carbon atoms with a density comprised between 0.910 and 0.940, involving a copolymerization of ethylene and an alpha-olefin having 6 carbon atoms in the gas phase by means of a fluidized bed, in the presence of a catalyst system comprising on the one hand a co-catalyst consisting of at least one organo-metallic compound of a metal of Groups II and III of the Periodic Table of Elements and on the other hand a supported catalyst comprising a special support based essentially on magnesium chloride and optionally aluminium chloride, on which support there has been precipitated a derivative of a transition metal of Groups IV, V and VI of the Periodic Table of elements.
    Type: Grant
    Filed: January 3, 1985
    Date of Patent: February 10, 1987
    Assignee: BP Chimie Societe Anonyme
    Inventors: Frederic Morterol, Jean L. Vidal
  • Process for the treatment of linear low density polyethylene by organic peroxides which generate free radicals
    Patent number: 4460750
    Abstract: The invention relates to a process of thermomechanical treatment in the molten state, in the presence of organic peroxides, of co-polymers with a density less than 0.935, obtained by co-polymerization under a pressure of less than 4 MP.sub.a of ethylene and a higher alpha-olefin. The co-polymers thus treated may advantageously be used for the manufacture of finished objects such as films according to the current techniques of conversion of "high pressure" type polyethylene.
    Type: Grant
    Filed: June 25, 1982
    Date of Patent: July 17, 1984
    Assignee: BP Chimie S.A.
    Inventors: Jean-Paul Thiersault, Alain Senez, Jean L. Vidal
  • Fluidized bed terpolymerization of ethylene, propylene and non-conjugated diene
    Patent number: 4343926
    Abstract: The invention concerns a process for the production of elastomeric terpolymers of ethylene, propylene and dienes by the direct polymerization of the monomeric olefins in the gaseous state, in contact with a catalytic system comprising one or more solid compounds of titanium. The resulting terpolymers which are produced in the form of powders can be used without intermediate transformation for the production of molded or extruded articles.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: August 10, 1982
    Assignee: NAOHTACHIMIE Societe Anonyme
    Inventors: Francois Caumartin, Jean L. Vidal, Pierre Mangin
  • Process for the treatment of linear low density polyethylene by organic peroxides which generate free radicals
    Patent number: RE33269
    Abstract: The invention relates to a process of thermomechanical treatment in the molten state, in the presence of organic peroxides, of co-polymers with a density less than 0.935, obtained by co-polymerization under a pressure of less than 4 MP.sub.a of ethylene and a higher alpha-olefin. The co-polymers thus treated may advantageously be used for the manufacture of finished objects such as films according to the current techniques of conversion of "high pressure" type polyethylene.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: July 17, 1990
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Jean-Paul Thiersault, Alain Senez, Jean L. Vidal