Patents by Inventor Dick De Wit

Dick De Wit 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).

  • Covering material for agricultural and horticultural soil
    Patent number: 5879695
    Abstract: A covering material for agricultural soil contains starch or a derivative or fraction thereof as binder together with a structure-improving amount of an acid and/or an oil, and a finely divided vegetable filler such as straw. The oil is for instance palm oil or linseed oil in an amount of 1-25 wt. %. The acid is preferably 0.2-4% by weight of phosphoric acid or citric acid. The material may further comprise fungicides, bentonite and/or rubber latices.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: March 9, 1999
    Assignee: Antonius Johannes Maria Bastiaansen
    Inventors: Antonius Johannes Maria Bastiaansen, Andries Hanzen, Dick De Wit, Huibert Tournois