Patents by Inventor Hugues Godfrin

Hugues Godfrin 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).

  • Process for the preparation of expandable polymer beads and materials derived therefrom
    Patent number: 5071882
    Abstract: The polymerization in aqueous suspension of at least one vinylaromatic monomer is carried out in the presence, relative to the vinylaromatic monomer, of approximately 0.01% to 0.06% by weight of at least one polyethylene wax and of approximately 0.005% to 0.1% by weight of at least one nonionic surface-active agent which has an HLB value of between 7 and 16.Materials obtained from expandable beads prepared according to this polymerization process.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: December 10, 1991
    Assignee: Atochem
    Inventor: Hugues Godfrin
  • Process for the preparation of expandable polymer beads and materials derived therefrom
    Patent number: 5011863
    Abstract: The polymerization in aqueous suspension of at least one vinylaromatic monomer is carried out in the presence, relative to the vinylaromatic monomer, of approximately 0.01% to 0.6% by weight of at least one polyethylene wax and of approximately 0.005% to 0.1% by weight of at least one nonionic surface-active agent which has an HLB value of between 7 and 16.Materials obtained from expandable beads prepared according to this polymerization process.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: April 30, 1991
    Assignee: Atochem
    Inventor: Hugues Godfrin