Patents Examined by Andrew L. Ohmans
  • Method for producing an ultraphobic surface on an aluminum base
    Patent number: 6652669
    Abstract: The invention relates to a method for producing an ultraphobic surface on aluminium as the supporting material and to the resulting surface and its use. According to said method, the surface of an aluminium support is anodized, especially by anodic oxidation, and/or electrochemically pickled in an acid solution with an alternating voltage, treated in hot water or water vapor at a temperature of 50 to 100° C., optionally coated with an adhesion promoter layer and then provided with a hydrophobic or especially oleophobic coating.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: November 25, 2003
    Assignee: Sunyx Surface Nanotechnologies GmbH
    Inventors: Karsten Reihs, Daniel-Gordon Duff, Georg Wiessmeier, Burkhard Koehler, Matthias Voetz, Juan Gonzalez-Blanco, Eckard Wenz
  • Method for enhancing the corrosion resistance of chemical conversion coating aluminum
    Patent number: 6074495
    Abstract: A method for treating aluminum to enhance corrosion resistance of its surface. The chemical conversion coating aluminum and aluminum alloys are exposed to an aqueous PU solution to form a PU film on the surface. The aqueous PU solution comprises: (i) 5-15% weight of water dispersable polyurethane resin, (ii) 0.1-56 weight of cross-linking agent, and (iii) 80-94.9% weight of water.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: June 13, 2000
    Assignee: Chung Shan Institute of Science & Technology
    Inventors: Yuh Sung, Chin-Lung Chang
  • Conversion coating and process and solution for its formation
    Patent number: 6022425
    Abstract: A process for forming a conversion coating on the surface of a metal, including: contacting the metal with an acidic solution containing an oxidant in order to initiate growth of a metal oxide cell structure on the metal surface; contacting the metal with water for a period of time sufficient to thicken the oxide and form a metal oxide containing layer of a desired thickness; and treating the metal with one or more rare earth elements in order to impregnate and substantially seal the metal oxide.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: February 8, 2000
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Karen Joy Hammon Nelson, Russell James Taylor, Anthony Ewart Hughes, Bruce Roy William Hinton, Mark Julian Henderson, Lance Wilson, Sally Ann Nugent