Patents by Inventor Evert R. Slootweg

Evert R. Slootweg 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).

  • Insecticidal composition and method for combatting aphids
    Patent number: 4925657
    Abstract: The invention provides insecticidal compositions for combatting aphids, which compositions contain an aphid insecticide in an amount lower than the minimum usual percentage for said insecticide in an aphicidal composition and an alarm pheromone for aphids. The compositions of the invention are less toxic because of the reduced insecticide content but they are not less effective than the insecticidal compositions which do not contain an alarm pheromone.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: May 15, 1990
    Assignee: Denka International B.V.
    Inventors: Antonie A. Den Braber, Evert R. Slootweg