Patents by Inventor Louis Leonard Weerkamp

Louis Leonard Weerkamp 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).

  • Support with super-absorbent material, method for the preparation thereof and use
    Patent number: 6274231
    Abstract: The invention relates to a support provided with super-absorbent material to be manufactured by causing suitable monomers to polymerize in the presence of a catalyst in order to obtain a polymer solution, adding a cross-linking agent to the polymer solution to obtain a pasty composition, subsequently applying the composition on or in a support and allowing the applied composition to dry and cross-link in order to obtain the support with the super-absorbent material, wherein microspheres are added to the paste.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: August 14, 2001
    Assignee: Blydenstein-Willink N.V.
    Inventor: Louis Leonard Weerkamp