Patents by Inventor Eberhard Lendle

Eberhard Lendle 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).

  • Metal stripping process and composition
    Patent number: 4424097
    Abstract: A stripper, for the removal of tin and tin compounds, in particular copper metal-resists in contact switches, comprises an aqueous solution of 5 to 20% v/v hydrochloric acid, 2.5 to 6.0 g/l copper and 9 to 40 g/l tin, as well as, at the beginning of the stripping process, up to 0.5 ml/l hydrogen peroxide or up to 0.015 ml/l of a surfactant.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: January 3, 1984
    Assignee: Elget Ing.-Bu/ ro fu/ r Grafische und Elektronische Technik
    Inventors: Erich Lipka, Eberhard Lendle