Patents by Inventor Stephan Vermeulen

Stephan Vermeulen 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).

  • Fertilizing preparation improving the extraction of phosphorus for plants
    Patent number: 5482529
    Abstract: A controllably active fertilizing preparation in the form of an emulsion-suspension or an emulsion is comprised of:a) 30-90% by weight of mixtures containing plant nutrients,b) 5-50% by weight of water,c) 2-20% by weight of an oleophilic organic substance,d) 1-25% by weight of a surface-active substance, ande) 0.1-10% by weight of an acid or its mixture, salt or anhydride. The acid component improves the extraction of phosphor.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: January 9, 1996
    Assignee: Kemira OY
    Inventors: Thomas Ahlnas, Stephan Vermeulen, Anders Weckman