Patents by Inventor Gerhard De Lind Van Wijngaarden

Gerhard De Lind Van Wijngaarden 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).

  • Fast-dispensing solid pvp-containing crop protection formulation and process therefor
    Patent number: 5665369
    Abstract: A process for producing a solid formulation of a crop protection agent which has an exceptionally fast rate of dispersion in water, and the formulation made by this process. This process includes coextruding a crop protection agent and polyvinylpyrrolidone, and subsequently cooling and milling the extrudate. The resulting granules may be pressed into tablets or agglomerated into larger granular masses.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: September 9, 1997
    Assignee: American Cyanamid Company
    Inventors: David John Wedlock, Gerhard De Lind Van Wijngaarden
  • Base oil compositions having improved light stability
    Patent number: 4031016
    Abstract: The daylight stability of hydroprocessed oils is improved by adding thereto (1) singlet oxygen quenchers suitably selected from the class consisting of carotenes, aliphatic amines and heterocyclic amines, and (2) certain aromatic secondary amines as antioxidants.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: June 21, 1977
    Assignee: Shell Oil Company
    Inventors: Hans Berger, Gerhard De Lind Van Wijngaarden, Jacobus H. Breuker