Patents by Inventor Waltraud Strache

Waltraud Strache 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).

  • palladium layers deposition process
    Patent number: 5882736
    Abstract: A formaldehyde-free chemical bath containing a palladium salt, a nitrogenated completing agent, and formic acid or formic acid derivatives, at a pH of greater than 4 and a process of using the chemical bath for depositing on a metal surface an adhesive, permanently glossy, bright palladium layer with few pores. The metal surface may be pretreated in a cementation palladium bath. The metal surface contains at least one of copper, nickel, and cobalt, as well as their alloys with one another and/or with phosphorus or boron.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: March 16, 1999
    Assignee: Atotech Deutschland GmbH
    Inventors: Ludwig Stein, Hartmut Mahlkow, Waltraud Strache
  • Process for the adhesive metallization of synthetic materials
    Patent number: 4929422
    Abstract: A process is disclosed for the adhesive metallization of synthetic materials, by means of pre-treatment of the synthetic materials and subsequent activation, as well as chemical and, if necessary, galvanic metal deposition, characterized by pre-treating the synthetic materials initially with an alkaline solution of an oxidation agent and then with a metal salt solution.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: May 29, 1990
    Assignee: Schering Aktiengesellschaft
    Inventors: Hartmut Mahlkow, Michael Romer, Gunther Rosskamp, Hubert-Matthias Seidenspinner, Ludwig Stein, Waltraud Strache