Patents by Inventor Cornelis Bontenbal

Cornelis Bontenbal 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).

  • Granulated material and process for the production of granulated materials
    Patent number: 4207116
    Abstract: A granulated absorbent material comprises cement, a clay preferably comprising sodium bentonite and an aggregate together with water, the weight ratio of cement to the total of the aggregate being in the range of 55:45 to 65:35, the ratio of clay to water being such that a mixture thereof has a viscosity in the range of 15-25 centipoises at 20.degree. C., and the quantity of water being in the range of 60-120% by weight of the dry constituents. The method of preparing the absorbent material comprises forming a paste of the constituents, hardening and drying the composition, and forming particles of the composition before, during or after hardening and drying.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: June 10, 1980
    Assignee: Bepro B.V.
    Inventors: Karl Been, Cornelis Bontenbal