Patents by Inventor van Kempen Carolien H. M.

van Kempen Carolien H. M. 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 a phenol-formaldehyde resin
    Patent number: 5359024
    Abstract: The invention relates to a process for the preparation of a phenol-formaldehyde resin by causing phenol and formaldehyde to condense under the influence of a basic catalyst, the catalyst being an aqueous solution containing alkali metal ions, carbonate ions, ions of carboxylic acids and one or more ions chosen from the group comprising transition metal ions and borates.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: October 25, 1994
    Assignee: DSM N.V.
    Inventors: Renier H. M. Kierkels, van Kempen Carolien H. M., Henricus A. C. Baur