Patents by Inventor Helmut Quast

Helmut Quast 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 the currentless deposition of electropositive metal layers on the surfaces of less electropositive metals
    Patent number: 4908241
    Abstract: The present invention provides a process for the currentless deposition of lectropositive metal layers on to appropriate less electropositive metals by contacting an object to be coated with a coating bath, wherein a coating bath is used which contains a metal complex obtained by reacting a monovalent electropositive metal halide with a base, which is capable of complex formation with the electropositive metal, and a hydrohalic acid.The present invention also provides a coating bath for the currentless deposition of electropositive metal layers on to less electropositive metals, wherein said bath contains an electropositive metal complex obtained by reacting a monovalent electropositive metal halide with a base which is capable of complex formation with the electropositive metal and a hydrohalic acid.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: March 13, 1990
    Assignee: Max-Planck-Gesellschaft zur Foederung der Wissenschaften e.V.
    Inventors: Helmut Quast, Johannes Raber, Walter Ott, Hans-Georg von Schnering, Karl Peters