Patents by Inventor Gerardus Korver

Gerardus Korver 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).

  • Patent number: 8343891
    Abstract: A method of improving the properties of urea granulates, more especially the caking tendency, the dust formation and the foaming tendency in aqueous media, by the addition of an additive to the urea, wherein the additive comprises a carboxylic acid compound with the general formula XY—(Z)—COOH, in which Z is a saturated or unsaturated hydrocarbon with 1-25 carbon atoms and X and Y are selected from the group consisting of a hydrogen atom or a polar organic functional group, and in that the additive is added as a solution in a polar solvent to the urea granulates, which are subsequently dried.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: January 1, 2013
    Assignee: Yara International ASA
    Inventors: Erik Alexander Bijpost, Luc Vanmarcke, Jacobus Gerardus Korver, Ruud van Belzen
  • Publication number: 20120137930
    Abstract: A composition and processes for the reduction of the tendency to baking, moisture absorption and/or dust formation of a granulate being susceptible therefore, such as fertilizers, minerals, ores, as well as to obtain stable coloring dispersions, density control of cokes and the reduction of foam in industrial processes, wherein synthetic polymers of fatty alkyl compounds, especially fatty acid esters and fatty-alcohols, fatty amines, fatty amides and fatty ethers, or distillation residues of the original monomers themselves, can be used, are disclosed. The distillation residues are preferably derived from the bottom fraction, obtained by distillation of the fraction being suitable as biodiesel during the biodiesel production process.
    Type: Application
    Filed: June 15, 2009
    Publication date: June 7, 2012
    Applicant: Holland Novochem B.V.
    Inventors: Erik Alexander Bijpost, Alexander Maslow, Jacobus Gerardus Korver
  • Patent number: 5174731
    Abstract: A method and an apparatus for control of the movement of a control piston an air control valve for a compressed air-operated double diaphragm pump, wherein the control piston is moved between the end positions in a control cylinder having inlet bores and outlet bores for the compressed air. The control piston is adjusted by a control medium. The method includes initially maintaining the control piston in an end position by a holding device against the pressure of the control medium for a predetermined period of time or until a counterpressure reaches a predetermined pressure level. Subsequently, the control piston is moved with a pushing force which is always greater than the maximum frictional forces. The holding device operates independently of the movement of the pump diaphragm, preferably using elastically, magnetically, or electromagnetically operating structural elements. The control cylinder includes separate connections for a control medium for moving the control piston.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: December 29, 1992
    Assignee: DEPA Gesellschaft fur Verfahrenstecnik mit beschrankter Haftung
    Inventor: Gerardus Korver