Patents by Inventor Johann Schoenwetter

Johann Schoenwetter 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).

  • Lamp-capping cement for electric lamps
    Publication number: 20040242749
    Abstract: The invention relates to a lamp-capping cement for electric lamps that contains poly-paraphenylene-terephthalamide as the thixotropic element. According to the invention, the poly-paraphenylene-terephthalamide is used in lamp-capping elements to adjust viscosity, especially to reduce the fluidity of the cement.
    Type: Application
    Filed: February 27, 2004
    Publication date: December 2, 2004
    Inventors: Rainer Schirmer, Johann Schoenwetter, Armin Wilhelm
  • Socket base filler for electric lamps
    Patent number: 6060548
    Abstract: A capping cement for electric lamps which has a minimal resin content. The capping cement includes both natural and synthetic resins, the content of the synthetic resins amounting to not more than 11 percent by weight and that of the natural resins not more than 5 percent by weight. Calcites are used exclusively as fillers. The weight proportion of natural resin to synthetic resin is advantageously between 0.1 and 0.5.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: May 9, 2000
    Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    Inventors: Rainer Schirmer, Johann Schoenwetter, Armin Wilhelm