Patents by Inventor Johannes-Adolf-Jacobus Geraedts

Johannes-Adolf-Jacobus Geraedts 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).

  • Method of improving the properties of reclaimed sand used for the production of foundry moulds and cores
    Patent number: 6015846
    Abstract: Particulate refractory aggregate containing elutable alkali is treated with a particulate active clay having a particle size of less than 0.5 mm in order to reduce the level of the elutable alkali. Sand recovered from spent foundry moulds and cores produced from alkaline binders can be treated to reduce its elutable alkali content and then recycled for further foundry use.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: January 18, 2000
    Assignee: Borden France S.A.
    Inventors: Philippe Marie Toussaint, Patrick Robert Queval, Johannes-Adolf-Jacobus Geraedts, Jacques Andre Caumont