Patents by Inventor Hendrikus Nicolaas Johannes Wijngaards

Hendrikus Nicolaas Johannes Wijngaards 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).

  • Method and apparatus for measuring the accessibility of porous materials with regard to large compounds
    Patent number: 6828153
    Abstract: The present invention provides a method for testing the accessibility of porous materials with regard to large, often high-molecular weight compounds and correlating said accessibility to the porous material's accessibility under conditions of use, i.e. the application conditions.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: December 7, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Robert Jan Jonker, Paul O'Connor, Hendrikus Nicolaas Johannes Wijngaards
  • Method and apparatus for measuring the accessibility of porous materials with regard to large compounds
    Publication number: 20020187555
    Abstract: The present invention provides a method for testing the accessibility of porous materials with regard to large, often high-molecular weight compounds and correlating said accessibility to the porous material's accessibility under conditions of use, i.e. the application conditions.
    Type: Application
    Filed: May 31, 2002
    Publication date: December 12, 2002
    Inventors: Robert Jan Jonker, Paul O'Connor, Hendrikus Nicolaas Johannes Wijngaards