Patents by Inventor Cornelis F. T. Visser

Cornelis F. T. Visser 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).

  • Measurement of moisture of potting soil
    Patent number: 6935166
    Abstract: The invention relates to a method and apparatus for determining the moisture content of bulk material, in particular potting soil, wherein the volume of a quantity of bulk material is determined, the weight of the quantity of bulk material is determined, the specific density is then determined from the volume and the weight, and finally the moisture content is determined by comparison with a table. The invention further relates to a method and apparatus for preparing bulk material, in particular potting soil, with a predetermined moisture content, wherein the volume of a quantity of bulk material is determined, the weight of the quantity of bulk material is determined, and water is then added to the quantity of bulk material until the weight associated with the desired moisture content is obtained.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: August 30, 2005
    Assignee: Visser's-Gravendeel Holding B.V.
    Inventor: Cornelis F. T. Visser