Patents by Inventor Horst Lehmann

Horst Lehmann 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).

  • Publication number: 20080140370
    Abstract: A method of determining a candidate for a product generated by a physical system administered with an educt, the method including determining the candidate for the product based on a combination of a plurality of different procedures for determining the product.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Inventors: Frank Kuhlmann, Frank Wolf, Uwe Nassal, Horst Lehmann, Edgar Naegele
  • Patent number: 7374650
    Abstract: Waterborne cathodic electrodeposition (CED) coating agents comprising resin solids and optionally pigments, fillers, organic solvents and conventional coating additives, wherein said CED coating agents comprise at least one bismuth salt selected from the group consisting of bismuth hydroxycarboxylic acid salts and bismuth sulfonic acid salts in a quantity of 0.1 to 2.5 wt-%, calculated as bismuth and relative to resin solids content, together with at least one compound selected from the group consisting of yttrium and neodymium compounds in a quantity of 0.1 to 1 wt-%, calculated as metal and relative to resin solids content.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: May 20, 2008
    Assignee: E.I. du Pont de Nemours & Company
    Inventors: Klausjoerg Klein, Horst Lehmann
  • Patent number: 7351319
    Abstract: Waterborne cathodic electrodeposition (CED) coating compositions comprising resin solids and optionally pigments, fillers and conventional coating additives, wherein said CED coating compositions comprise at least one bismuth compound in a quantity of 0.1 to 2.5 wt. %, calculated as bismuth and relative to resin solids content, together with at least one dicarboxylic acid selected from among acyclic dicarboxylic acids with 3 to 7 carbon atoms and dicarboxylic acids with 8 to 10 carbon atoms comprising a cyclic structural unit in a quantity of 3 to 15 equivalent-%, relative to the acid equivalents present in the CED coating composition.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: April 1, 2008
    Assignee: E. I. du Pont de Nemours & Co.
    Inventors: Horst Lehmann, Klausjoerg Klein
  • Patent number: 7211182
    Abstract: A process for the production of a CED (cathodic electrodeposition) coating with improved adhesion towards subsequent layers by cathodic electrodeposition of a coating layer of a CED coating composition onto an electrically conductive substrate and thermal curing by baking in an indirectly heated circulating air oven operated with a proportion of fresh air in the circulating air of the oven of 0 to 20 vol. %, wherein the CED coating composition used contains at least one water-soluble metal nitrate corresponding to a quantity of 1 to 10 mmol of nitrate per 100 g of resin solids content, wherein the metal is selected from the group consisting of metals of atomic numbers 20 to 83, with the exception of chromium, arsenic, rubidium, ruthenium, rhodium, palladium, cadmium, antimony, caesium, osmium, iridium, platinum, mercury, thallium and lead, and wherein at most 50 area-% of the CED-coated substrate surface are rinsed with water prior to thermal curing.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: May 1, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Horst Lehmann, Klausjoerg Klein, Rudolf Schipfer
  • Publication number: 20050061677
    Abstract: A process for the production of a CED (cathodic electrodeposition) coating with improved adhesion towards subsequent layers by cathodic electrodeposition of a coating layer of a CED coating composition onto an electrically conductive substrate and thermal curing by baking in an indirectly heated circulating air oven operated with a proportion of fresh air in the circulating air of the oven of 0 to 20 vol. %, wherein the CED coating composition used contains at least one water-soluble metal nitrate corresponding to a quantity of 1 to 10 mmol of nitrate per 100 g of resin solids content, wherein the metal is selected from the group consisting of metals of atomic numbers 20 to 83, with the exception of chromium, arsenic, rubidium, ruthenium, rhodium, palladium, cadmium, antimony, caesium, osmium, iridium, platinum, mercury, thallium and lead, and wherein at most 50 area-% of the CED-coated substrate surface are rinsed with water prior to thermal curing.
    Type: Application
    Filed: September 23, 2003
    Publication date: March 24, 2005
    Inventors: Horst Lehmann, Klausjoerg Klein, Rudolf Schipfer
  • Patent number: 6843856
    Abstract: Aqueous cleaning agent and its use in a process for cleaning ultrafiltration membranes in ultrafiltration units of electro-dipcoating plants, which cleaning agent contains electro-dipcoating lacquer (EDL) binders overneutalized with neutralizing agent.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: January 18, 2005
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Horst Lehmann, Hans-Peter Bünger
  • Publication number: 20040146716
    Abstract: Waterborne cathodic electrodeposition (CED) coating compositions comprising resin solids and optionally pigments, fillers and conventional coating additives, wherein said CED coating compositions comprise at least one bismuth compound in a quantity of 0.1 to 2.5 wt. %, calculated as bismuth and relative to resin solids content, together with at least one dicarboxylic acid selected from among acyclic dicarboxylic acids with 3 to 7 carbon atoms and dicarboxylic acids with 8 to 10 carbon atoms comprising a cyclic structural unit in a quantity of 3 to 15 equivalent-%, relative to the acid equivalents present in the CED coating composition.
    Type: Application
    Filed: October 27, 2003
    Publication date: July 29, 2004
    Inventors: Horst Lehmann, Klausjoerg Klein
  • Publication number: 20040106710
    Abstract: Waterborne cathodic electrodeposition (CED) coating agents comprising resin solids and optionally pigments, fillers, organic solvents and conventional coating additives, wherein said CED coating agents comprise at least one bismuth salt selected from the group consisting of bismuth hydroxycarboxylic acid salts and bismuth sulfonic acid salts in a quantity of 0.1 to 2.5 wt-%, calculated as bismuth and relative to resin solids content, together with at least one compound selected from the group consisting of yttrium and neodymium compounds in a quantity of 0.1 to 1 wt-%, calculated as metal and relative to resin solids content.
    Type: Application
    Filed: August 18, 2003
    Publication date: June 3, 2004
    Inventors: Klausjoerg Klein, Horst Lehmann
  • Patent number: 4038454
    Abstract: A novel cured pressure-sensitive adhesive-coated sheet material comprising a flexible backing having bonded thereto a pressure-sensitive adhesive material containing copolymers of 2-ethyl hexyl acrylate, butyl acrylate and glycidyl acrylate or glycidyl methacrylate. The monomer-mixture for the pressure-sensitive adhesive material may also contain minor amounts of monomers with acid anhydride groups or monomers with carboxyl groups. The curing of the pressure-sensitive adhesive material is accomplished by heating the copolymers to a temperature between 60.degree. and 100.degree. C., in the presence of a zinc chloride catalyst whereby the copolymers become cross-linked to obtain a solvent-, heat- and weather-resistant pressure-sensitive adhesive-coated sheet material.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: July 26, 1977
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: G. W. Horst Lehmann, H. A. Julius Curts