Patents by Inventor Annette Klaus

Annette Klaus 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).

  • Black surface layer on light metal
    Patent number: 5075178
    Abstract: The invention relates to a cyanide-free electrolyte being harmless to the environment and to health which makes feasible the production of black surface layers on light metals or on alloys of the latter, preferably titanium, remaining deeply-black and adhesive even after extreme changes in the ambient temperature and having nearly equal values of the optical absorptivity of radiation and of the thermal emission capability (the .alpha./.epsilon.-ratio is about 0.95) by means of the anodic oxidation by spark discharge (ANDF-method). These layers are absolutely X-amorphous and show, hence, an ideal optically isotropic behavior regarding the reflection of radiation. Due to their minmum evolution of gases they offer a high thermovacuum stability. The electrolyte consists of an ammoniacal solution of K.sub.2 H.sub.2 PO.sub.4 potassium dihydrogenphosphate and K.sub.2 CrO.sub.4 potassium chromate. The homogeneity of the optically black layers is ensured by not using fluoride ions and employing acetate ions.
    Type: Grant
    Filed: January 7, 1990
    Date of Patent: December 24, 1991
    Assignee: Jenoptik Jena GmbH
    Inventors: Juergen Schmidt, Thomas Furche, Roland Erdmann, Marion Reichert, Bayer Ullrich, Peter Kurze, Thomas Schwarz, Joachim Schreckenbach, Hans-Juergen Kletke, Andreas Hofmann, Martin Heppner, Anja Hasse, Dorith Schmidt, Annette Klaus
  • Electrolyte for the production of black surface layers on light metals
    Patent number: 5035781
    Abstract: The invention relates to a cyanide-free electrolyte being harmless to the environment and to health which makes feasible the production of black surface layers on light metals or on alloys of the latter, preferably titanium, remaining deeply-black and adhesive even after extreme changes in the ambient temperature and having nearly equal values of the optical absorptivity of radiation and of the thermal emission capability (the .alpha./.epsilon.-ratio is about 0.95) by means of the anodic oxidation by spark discharge (ANOF-method). These layers are absolutely X-amorphous and show, hence, an ideal optically isotropic behavior regarding the reflection of radiation. Due to their minimum evolution of gases they offer a high thermovacuum stability. The electrolyte consists of an ammoniacal solution of K.sub.2 H.sub.2 PO.sub.4 potssium dihydrogenphosphate and K.sub.2 CRO.sub.4 potassium chromate. The homogeneity of the optically black layers is ensured by not using fluoride ions and employing acetate ions.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: July 30, 1991
    Assignee: Jenoptik Jena GmbH
    Inventors: Jurgen Schmidt, Thomas Furche, Roland Erdmann, Marion Reichert, Ullrich Bayer, Peter Kurze, Thomas Schwarz, Joachim Schreckenbach, Hans-Jurgen Kletke, Andreas Hoffmann, Martin Heppner, Anja Hasse, Dorith Schmidt, Annette Klaus