Patents by Inventor Julian Francis George Hopper

Julian Francis George Hopper 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 hydrolysing polyurethane degradation products
    Patent number: 5714523
    Abstract: Process for alcoholizing and hydrolysing a flexible polyurethane foam by bringing a flexible polyurethane foam in contact with an alcoholizing polyol, allowing the foam and the polyol to react in the presence of a catalyst which enhances alcoholysis and hydrolysis of the foam in an amount of 0.001 to 0.25 and preferably 0.001 to 0.08% by weight based on the weight of the foam, then allowing the mixture to separate in an upper phase and a lower phase and collecting these phases in separate containers, wherein the hydrolysis is conducted by adding water and allowing the mixture to react with the water after the foam has been combined with the polyol and before the mixture is allowed to separate.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: February 3, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Julian Francis George Hopper, Patrick Margriet Gaston Goegebeur, Harry Kooren
  • Recycling of flexible foam
    Patent number: 5691389
    Abstract: Process for recycling flexible foams by glycolysis and extraction. The glycolysis is conducted by allowing the foam to react with low molecular weight polyols, then allowing the mixture to separate in two phases.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: November 25, 1997
    Assignee: Imperial Chemical Industries PLC
    Inventors: Giovanni Parrinello, David Thorpe, Gabriel Verhelst, Julian Francis George Hopper, Mireille Berthine Albert De Witte