Patents by Inventor Theodora Dirking

Theodora Dirking 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).

  • Process for producing multi-layer coating wherein the quotient of the surface energies of a second coating layer divided by a first coating layer is less-than-or-equal-to 1
    Patent number: 7399503
    Abstract: Process for producing a multilayer coating, in which a first coating (A) has applied to it a subsequent coating material (B) which is then cured involves selecting and/or modifying the first coating (A) and/or selecting the coating material (B) in such a way that the quotient (Q) formed from the surface energy of the second coating (B) and the surface energy of the first coating (A) is less than or equal to 1, and its use.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: July 15, 2008
    Assignee: BASF Coatings AG
    Inventors: Klaus Holzapfel, Peter Mayenfels, Hubert Baumgart, Theodora Dirking
  • Method for producing a multilayer coating
    Publication number: 20060083860
    Abstract: Process for producing a multilayer coating, in which a first coating (A) has applied to it a subsequent coating material (B) which is then cured involves selecting and/or modifying the first coating (A) and/or selecting the coating material (B) in such a way that the quotient (Q) formed from the surface energy of the second coating (B) and the surface energy of the first coating (A) is less than or equal to 1, and its use.
    Type: Application
    Filed: January 30, 2004
    Publication date: April 20, 2006
    Inventors: Klaus Holzapfel, Peter Mayenfels, Hubert Baumgart, Theodora Dirking
  • Method of and apparatus for measuring the viscosity of materials
    Patent number: 5212981
    Abstract: The invention relates to a process and device for measuring the effective viscosity and the elastic properties of coatings. Known measuring processes and measuring devices based on the "rolling ball method" suffer from drawbacks, namely run formation and sinking of the relatively heavy solvent vapors, due to the inclination of the coated sheet metal. To overcome these drawbacks, rolling movements are imparted to a magnetizable ball (1) displaced from its rest position in a magnetic field, during movement of the horizontally disposed substrate, under the influence of the field gradient of a permanent magnet or electromagnet (4) located below the substrate. The rolling movements are used as the basis for the measurements.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: May 25, 1993
    Assignee: BASF Lacke & Farben AG
    Inventors: Martin Laun, Wolfgang Goring, Theodora Dirking, Hans-Joachim Streitberger
  • Process for removing from electrocoating baths impurities which cause surface defects
    Patent number: 4956096
    Abstract: A process for removing from electrocoating baths impurities which cause surface defects.The invention relates to a process for removing from electrocoating baths impurities which cause surface defects, wherein the electrocoating paint, in addition to the purification operations which are already conventional, is filtered without pressure through an adsorbent which adsorbs hydrophobic substances having a surface tension.ltoreq.35 mN/m--preferably homopolymers or copolymers of ethylene, propylene, but-1-ene or but-2-ene, which, if appropriate, contain further nonpolar comonomers.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: September 11, 1990
    Assignee: BASF Lacke & Farben AKT
    Inventors: Klaus Arlt, Theodora Dirking, Karl H. Josten, Hans J. Streitberger