Patents by Inventor Eckart Schönfelder

Eckart Schönfelder 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).

  • Method for coating metal surfaces with an activating agent prior to phosphating
    Patent number: 9364855
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: June 14, 2016
    Assignee: Chemetall GmbH
    Inventors: Thomas Kolberg, Eckart Schönfelder, Olaf Dahlenburg, Manfred Walter
  • Method for coating metal surfaces with an activating agent prior to phosphating
    Patent number: 9358574
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: June 7, 2016
    Assignee: Chemetall GmbH
    Inventors: Thomas Kolberg, Eckart Schoenfelder, Olaf Dahlenburg, Manfred Walter
  • METHOD FOR COATING METAL SURFACES WITH AN ACTIVATING AGENT PRIOR TO PHOSPHATING
    Publication number: 20140051311
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Application
    Filed: October 25, 2013
    Publication date: February 20, 2014
    Applicant: Chemetall GmbH
    Inventors: Thomas KOLBERG, Eckart SCHOENFELDER, Olaf DAHLENBURG, Manfred WALTER
  • METHOD FOR COATING METAL SURFACES WITH AN ACTIVATING AGENT PRIOR TO PHOSPHATING
    Publication number: 20110226159
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Application
    Filed: December 9, 2009
    Publication date: September 22, 2011
    Inventors: Thomas Kolberg, Eckart Schönfelder, Olaf Dahlenburg, Manfred Walter
  • METHOD AND SOLUTION FOR COATING METALLIC SURFACES WITH A PHOSPHATING SOLUTION CONTAINING HYDROGEN PEROXIDE, METALLIC OBJECT PRODUCED AND USE OF THE OBJECT
    Publication number: 20110180186
    Abstract: A method for the treatment or pre-treatment of surfaces of metal objects by means of an acidic, aqueous solution containing zinc and phosphate. The phosphating solution contains between 0.1-10 g/L, zinc, 4-50 g/L phosphate calculated as PO4, between 0.03-3 g/L, of at least one guanidine compound comprising at least one nitro group calculated as nitroguanidine, and between 0.001-0.9 g/L hydrogen peroxide and has a temperature of less than 80° C. The corresponding acidic, aqueous composition and finished products are also disclosed.
    Type: Application
    Filed: April 7, 2011
    Publication date: July 28, 2011
    Inventors: Thomas Nitschke, Rudiger Rein, Eckart Schönfelder, Peter Schubach, Jürgen Specht
  • CLEANING COMPOSITION FOR METAL SURFACES
    Publication number: 20100222248
    Abstract: The invention relates to an aqueous alkaline cleaning composition for cleaning metal surfaces, containing at least one non-ionic surfactant having demulsifying action and based on ethoxylated alkyl alcohols having one or two alkyl groups, each comprising an average of 7.5 to 16.5 carbon atoms, and an average of 5.5 to 18.5 EO groups per alkyl group, and comprising an end group closure or two end group closures, of which at least one end group closure is an isopropyl, isobutyl, tertiary butyl and/or benzyl group, wherein the surfactant is not propoxylated.
    Type: Application
    Filed: September 30, 2008
    Publication date: September 2, 2010
    Inventors: Carola Komp, Eckart Schönfelder