Patents by Inventor Lucas E. M. Langezaal

Lucas E. M. Langezaal 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).

  • Agroblock, such as agroplug, agroplug system and a plug strip therefor
    Patent number: 5218783
    Abstract: The invention relates to an agroblock comprising an inorganic soil type, such that the agroblock is substantially form-retaining at any moisture content and that at a suction pressure of pF 2 the moisture content amounts to at least 15% by volume. Preferably the agroblock comprises a homogeneous mixture of mineral wool and said inorganic soil type, wherein the quantity of mineral wool amounts to 0-90% by weight, and the amount of soil type amounts to 100-10% by weight.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: June 15, 1993
    Assignee: Rockwool Lapinus B.V.
    Inventors: Lucas E. M. Langezaal, Jacob F. de Groot