Patents by Inventor Harald Kupplemaier

Harald Kupplemaier 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).

  • Naphtholactam dyes and optical recording medium containing these dyes
    Patent number: 4939012
    Abstract: Naphtholactam dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, n, p, Z.sup.1, Z.sup.2 and the rings A, B, C and D each have the meanings stated in the description, and an optical recording medium which contains one or more naphtholactam dyes and may contain a base.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: July 3, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Dust, Peter Neumann, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski, Klaus-Dieter Schomann, Harald Kupplemaier, Eberhard Koester