Patents by Inventor Klaus Werner Wittel

Klaus Werner Wittel 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 and solution for providing a conversion coating on a metallic surface I
    Patent number: 6773516
    Abstract: An aqueous acidic solution for forming a rare earth element containing conversion coating on the surface of a metal, said solution being chromate-free and including effective quantities of at least one rare earth element (as herein defined) containing species, an oxidant and at least one accelerator, comprising a metal selected from Groups VA and VIA of the Periodic Table.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: August 10, 2004
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Simon Gerard Hardin, Klaus Werner Wittel, Anthony Ewart Hughes, Karen Joy Hammon Nelson
  • Process and solution for providing a conversion coating on a metallic surface II
    Patent number: 6755917
    Abstract: An aqueous acidic solution for forming a conversion coating on the surface of a metallic material, said solution containing at least one rare earth element (as herein defined) containing species, an accelerator additive selected from the group consisting of metals of Group IB, IIB, IVA, VA, VIA and VIII of the Periodic Table, a peroxidic species and at least one acid selected from the group of mineral acids, carboxylic acids, sulphonic acids and phosphonic acids, wherein said solution contains no more than 20 mg/liter each of fluoride and of phosphate, and the solution is essentially free of chromate.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: June 29, 2004
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Simon Gerard Hardin, Klaus Werner Wittel, Anthony Ewart Hughes, Karen Joy Hammon Nelson
  • Process and solution for providing a conversion coating on a metallic surface II
    Publication number: 20020096230
    Abstract: An aqueous acidic solution for forming a conversion coating on the surface of a metallic material, said solution containing at least one rare earth element (as herein defined) containing species, an accelerator additive selected from the group consisting of metals of Group IB, IIB, IVA, VA, VIA and VIII of the Periodic Table, a peroxidic species and at least one acid selected from the group of mineral acids, carboxylic acids, sulphonic acids and phosphonic acids, wherein said solution contains no more than 20 mg/liter each of fluoride and of phosphate, and the solution is essentially free of chromate.
    Type: Application
    Filed: November 20, 2001
    Publication date: July 25, 2002
    Inventors: Simon Gerard Hardin, Klaus Werner Wittel, Anthony Ewart Hughes, Karen Joy Hammon Nelson
  • Process and solution for providing a conversion coating on a metallic surface I
    Publication number: 20020084002
    Abstract: An aqueous acidic solution for forming a rare earth element containing conversion coating on the surface of a metal, said solution being chromate-free and including effective quantities of at least one rare earth element (as herein defined) containing species, an oxidant and at least one accelerator, comprising a metal selected from Groups VA and VIA of the Periodic Table.
    Type: Application
    Filed: November 20, 2001
    Publication date: July 4, 2002
    Inventors: Simon Gerard Hardin, Klaus Werner Wittel, Anthony Ewart Hughes, Karen Joy Hammon Nelson