Patents by Inventor Gertjan A. O. Teekman

Gertjan A. O. Teekman 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 for reducing the leachability of granular material and granular material obtained using this method
    Patent number: 5180638
    Abstract: A method for reducing the leachability of granular material which consists essentially of an inorganic binder and a filler containing contaminants, in which individual particles of the granular material are coated with a closed coating of a water-insoluble and water-repellent polymer composition. The coating is preferably a bituminous material.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: January 19, 1993
    Assignee: Aardelite Holding B.V.
    Inventor: Gertjan A. O. Teekman