Patents by Inventor Veerle Maria Rafaela Dirckx

Veerle Maria Rafaela Dirckx 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).

  • Use of polyol mixtures in rigid and semi-rigid polyurethane foams
    Patent number: 5874484
    Abstract: The present invention relates to a mixture of polyols for use in the preparation of polyurethane foam comprising:(i) 80-99% by weight of at least one polyether polyol and/or at least one polyester polyol; and(ii) 1-20% by weight of at least one polyolefin polyol.The invention further relates to a process for preparing polyurethane foams, using the said mixture of polyols; to polyurethane foams obtainable by such process; and to articles and composites containing the said polyurethane foams.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: February 23, 1999
    Assignee: Shell Oil Company
    Inventors: Veerle Maria Rafaela Dirckx, Eric-Jack Gerard, Hans Ferdinand Vermeire