Patents by Inventor Laurent PETITJEAN

Laurent PETITJEAN 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).

  • Patent number: 12024631
    Abstract: The tread of a civil engineering vehicle tire comprises a rubber composition based on at least one elastomer matrix comprising from 50 to 100 phr of a styrene-butadiene copolymer and from 0 to 50 phr of isoprene elastomer; a reinforcing filler comprising predominantly carbon black with CTAB specific surface area greater than or equal to 90 m2/g; from 1 to 30 phr of at least one hydrocarbon resin predominantly consisting of units derived from aromatic and cycloaliphatic monomers, having an aromatic proton content between 0 and 12%, an ethylenic proton content greater than 3%, a number-average molecular weight above 500 g/mol and a polydispersity index greater than 2; and a crosslinking system.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: July 2, 2024
    Assignee: COMPAGNIE GENERALE DES ETALISSEMENTS MICHELIN
    Inventors: Benoit De Gaudemaris, Alain Hut, Laurent Petitjean
  • Patent number: 10961374
    Abstract: A rubber composition based on at least an elastomer matrix is provided. The elastomer matrix comprises a first diene elastomer having a number-average molecular weight, Mn, of greater than or equal to 100 000 g/mol; a functionalized second diene elastomer bearing at the chain end a function capable of reacting with the surface of silica, said functionalized diene elastomer having a number-average molecular weight, Mn, of less than or equal to 80 000 g/mol: and a reinforcing inorganic filler, in an amount ranging from 55 phr to 200 phr. The elastomeric matrix allows good dispersion of the reinforcing inorganic filler. A finished or semi-finished article comprising such a composition, tire tread comprising such a composition, and a tire or semi-finished product comprising such a composition is also provided.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: March 30, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Séverin Dronet, Laurent Petitjean, Marc Couty, Corentin Pavageau
  • Publication number: 20200392314
    Abstract: The tread of a civil engineering vehicle tire comprises a rubber composition based on at least one elastomer matrix comprising from 50 to 100 phr of a styrene-butadiene copolymer and from 0 to 50 phr of isoprene elastomer; a reinforcing filler comprising predominantly carbon black with CTAB specific surface area greater than or equal to 90 m2/g; from 1 to 30 phr of at least one hydrocarbon resin predominantly consisting of units derived from aromatic and cycloaliphatic monomers, having an aromatic proton content between 0 and 12%, an ethylenic proton content greater than 3%, a number-average molecular weight above 500 g/mol and a polydispersity index greater than 2; and a crosslinking system.
    Type: Application
    Filed: December 13, 2018
    Publication date: December 17, 2020
    Inventors: BENOIT DE GAUDEMARIS, ALAIN HUT, LAURENT PETITJEAN
  • Publication number: 20190367711
    Abstract: A rubber composition based on at least an elastomer matrix is provided. The elastomer matrix comprises a first diene elastomer having a number-average molecular weight, Mn, of greater than or equal to 100 000 g/mol; ii. a functionalized second diene elastomer bearing at the chain end a function capable of reacting with the surface of silica, said functionalized diene elastomer having a number-average molecular weight, Mn, of less than or equal to 80 000 g/mol; and a reinforcing inorganic filler, in an amount ranging from 55 phr to 200 phr. The elastomeric matrix allows good dispersion of the reinforcing inorganic filler. A finished or semi-finished article comprising such a composition, a tyre tread comprising such a composition, and a tire or semi-finished product comprising such a composition is also provided.
    Type: Application
    Filed: December 21, 2017
    Publication date: December 5, 2019
    Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Séverin DRONET, Laurent PETITJEAN, Marc COUTY, Corentin PAVAGEAU