Patents by Inventor Ulla Langelotz

Ulla Langelotz 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).

  • Die-casting brass alloy which is resistant to dezincification
    Patent number: 6787101
    Abstract: The present invention relates to a die-casting brass alloy having a dezincification resistance, which is lower than 100 &mgr;m for a separate value according to British Standard BS 2872 in a die-casting condition (i.e. without a subsequent phase transforming heat treatment). The alloy according to the invention is characterized by the following composition: Cu: 63.6 weight-% Pb: 1.8 weight-% Si: 0.73 weight-% Al: 0.07 weight-% As: 0.06 weight-% Ni: 0.2 weight-% Sn: 0.3 weight-% Fe: 0.25 weight-% B: 8 ppm Other impurities: max. 0.3 weight-% Zn: remainder.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: September 7, 2004
    Assignee: Tour & Andersson AB
    Inventors: Carl-Åke Däcker, Ulla Langelotz