Patents by Inventor Robert Bleijerveld

Robert Bleijerveld 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).

  • Methods of manufacturing hydraulic materials
    Patent number: 5868829
    Abstract: A method of making a hydraulic material which contains metakaolinite and calcium hydroxide from a kaolin-containing compound. The method is performed in a fluidized bed installation having a freeboard under conditions such that the amount of calcium oxide formed is minimized. Preferably, the method is performed at a fluidized bed temperature of 780.degree. C. and a freeboard temperature of no more than 780.degree. C. By minimizing the amount of calcium hydroxide formed, the use of an additional installation for converting calcium oxide to calcium hydroxide is avoided. The starting material is typically waste paper and other residues from recycling of waste paper for reuse in the paper industry. The product may be used to form concrete having a high compression strength.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: February 9, 1999
    Assignee: CDEM Holland, B. V.
    Inventors: Joseph Jan Peter Biermann, Robert Bleijerveld, Nicolaas Voogt, Hendrik Jacobus Hulscher