Patents by Inventor Josef Hrach

Josef Hrach 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).

  • Molding compounds based on polybutylene terephthalate
    Patent number: 4052356
    Abstract: Reinforced polybutylene terephthalate which contain kaolin have improved arc resistance with at the same time improved tracking resistance.
    Type: Grant
    Filed: April 6, 1976
    Date of Patent: October 4, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Franz Breitenfellner, Josef Hrach