Patents by Inventor Johannes Marinus Maria De Kok

Johannes Marinus Maria De Kok 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).

  • Anodizing an article of aluminum or alloy thereof
    Patent number: 11326269
    Abstract: A method of anodizing an article of aluminum or aluminum alloy for forming a porous anodic oxide coating comprises an immersion step of immersing the article to be anodized in an electrolyte in a tank, wherein the electrolyte comprises an aqueous solution of 5-50 g/l sulphuric acid and 2-50 g/l phosphoric acid, and arranging the article as an anode with respect to one or more counter electrodes as arranged cathodes in the electrolyte, and an anodizing step of applying a positive anode voltage Va to the article, while the temperature of the electrolyte is in the range of 33-60° C.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: May 10, 2022
    Assignee: Fokker Aerostructures B.V.
    Inventors: Johannes Marinus Maria De Kok, Vincent Kornelis Johannes Van Den Heuvel
  • ANODIZING AN ARTICLE OF ALUMINUM OR ALLOY THEREOF
    Publication number: 20190112725
    Abstract: A method of anodizing an article of aluminum or aluminum alloy for forming a porous anodic oxide coating comprises an immersion step of immersing the article to be anodized in an electrolyte in a tank, wherein the electrolyte comprises an aqueous solution of 5-50 g/l sulphuric acid and 2-50 g/l phosphoric acid, and arranging the article as an anode with respect to one or more counter electrodes as arranged cathodes in the electrolyte, and an anodizing step of applying a positive anode voltage Va to the article, while the temperature of the electrolyte is in the range of 33-60° C.
    Type: Application
    Filed: April 18, 2017
    Publication date: April 18, 2019
    Inventors: Johannes Marinus Maria De Kok, Vincent Kornelis Johannes Van Den Heuvel