Patents by Inventor Michael A. Acker

Michael A. Acker 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).

  • Optical recording medium which has a reflector layer containing a silicon-phthalocyanine derivative
    Patent number: 4917989
    Abstract: An optical recording medium contains a transparent base, a dye-containing layer which is sensitive to laser light and a reflector layer which contains a silicon-phthalocyanine derivative of the formula ##STR1## where R.sup.1 is hydrogen, alkyl, alkoxy, halogen or trialkylsilyl, n is 1, 2, 3 or 4 and A and B are identical or different and independently of one another are each alkyl, halogen or unsubstituted or substituted alkoxy or trialkylsilyloxy.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: April 17, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Albert, Peter Hauser, Michael Acker, Wolfgang Schrott, Gerhard Wagenblast