Patents by Inventor Siegfried Augst

Siegfried Augst 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).

  • Polyphenylenevinylene photoconductor composition sensitized with a 1,4-bis (styryl) benzene derivative
    Patent number: 3992203
    Abstract: Electrophotographic recording material is disclosed comprising at least one polyphenylenevinylene having a molecular weight greater than 2,000 g/mol and at least one 1,4-bis (styryl) benzene derivative.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: November 16, 1976
    Assignee: VEB Pentacon Dresden
    Inventors: Hans-Heinrich Horhold, Joachim Gottschaldt, Regina Bergmann, Johannes Opfermann, Walter Seliger, Siegfried Augst, Hartmut Arnstadt