Patents by Inventor Rainer Scheffel

Rainer Scheffel 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).

  • Multi-stage anti-corrosion treatment of metal components having zinc surfaces
    Patent number: 9534301
    Abstract: The present invention relates to the field of phosphating for corrosion-protective pretreatment of zinc surfaces, being directed toward the use of largely nickel- and cobalt-free zinc phosphating solutions. The present invention makes available an alternative to trication zinc phosphating, in which the zinc surfaces of a component are firstly, before zinc phosphating, passivated with an alkaline composition containing iron(III) ions, and thereby preconditioned for a largely nickel- and cobalt-free zinc phosphating operation. In a further aspect, the invention relates to a component, in particular an automobile body, that comprises at least in part surfaces made of zinc, the zinc surfaces being covered by a two-layer system made up of a first, inner passive layer containing iron and resting on the zinc surface, and a second, outer crystalline zinc phosphate layer resting on the inner layer.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: January 3, 2017
    Assignee: Henkel AG & Co. KGaA
    Inventors: Jan-Willem Brouwer, Frank-Oliver Pilarek, Rainer Scheffel
  • MULTI-STAGE ANTI-CORROSION TREATMENT OF METAL COMPONENTS HAVING ZINC SURFACES
    Publication number: 20140023882
    Abstract: The present invention relates to the field of phosphating for corrosion-protective pretreatment of zinc surfaces, being directed toward the use of largely nickel- and cobalt-free zinc phosphating solutions. The present invention makes available an alternative to trication zinc phosphating, in which the zinc surfaces of a component are firstly, before zinc phosphating, passivated with an alkaline composition containing iron(III) ions, and thereby preconditioned for a largely nickel- and cobalt-free zinc phosphating operation. In a further aspect, the invention relates to a component, in particular an automobile body, that comprises at least in part surfaces made of zinc, the zinc surfaces being covered by a two-layer system made up of a first, inner passive layer containing iron and resting on the zinc surface, and a second, outer crystalline zinc phosphate layer resting on the inner layer.
    Type: Application
    Filed: September 19, 2013
    Publication date: January 23, 2014
    Inventors: Jan-Willem Brouwer, Frank-Oliver Pilarek, Rainer Scheffel