Patents by Inventor Kurt Schumacher

Kurt Schumacher 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).

  • Substituted 6-benzyl-2H-3,4,5,6-tetrahydro-(1,3)-oxazines
    Patent number: 5114935
    Abstract: Novel compounds of the general formula ##STR1## which have antitussive activity, wherein R.sub.1 -R.sub.4 are as defined herein.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: May 19, 1992
    Assignee: Dr. Karl Thomae GmbH
    Inventors: Helmut Ballhause, Gunther Engelhardt, Claus A. Landgraf, Norbert Mayer, Willy Roth, Kurt Schumacher, Alex Prox
  • Method of manufacturing a color television display tube
    Patent number: 4325166
    Abstract: A method is provided for positioning a supporting frame for a color television tube mask in a repeatedly obtainable rest position with respect to the face plate of the tube during various stages of the tube manufacture which require accurate positioning of the frame. Such stages include attachment of the mask to the frame to form a color selection electrode, connection to the frame of means for increasing the mechanical stability of the electrode, and repeated exposures and chemical treatments of color phosphors on the face plate. The method comprises applying a time-varying magnetic field to the frame until it is vibrated into an ultimate rest position relative to the face plate.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: April 20, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Hubert Goddecke, Werner Reichardt, Kurt Schumacher, Rainer Topfer