Patents by Inventor Albert Willem Knop

Albert Willem Knop 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).

  • Mineral wool plant substrate
    Patent number: 6183531
    Abstract: Mineral wool plant substrate formed of a coherent matrix of mineral wool having 99.9 to 75 wt % mineral wool and 0.1 to 25 wt % of an organic substance. Clay may be included in the matrix. The matrix may be in the form of a pellet.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: February 6, 2001
    Assignee: Rockwool/Grodan B.V.
    Inventors: Jacob Frank De Groot, Albert Willem Knop, Paul Jacques Louis Hubert Bouwens