Patents by Inventor Bruno Testard

Bruno Testard 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).

  • Polyamide-imide based filaments, and a process for obtaining them
    Patent number: 5159052
    Abstract: The present invention relates to heat-resistant threads, filaments and fibres based on polyamide-imide. They have a polydispersion index I.ltoreq.2.2, a breaking tenacity.gtoreq.45 cN/tex, a Young's modulus.gtoreq.3.8 GPa, an elongation.ltoreq.25% and a color defined by the luminance Y>25%, the degree of whiteness DW<30 and the yellow index YI>170. In addition they have a very good stability to light, quantified by the retention of the mechanical characteristics. They have wide application in working and protective garments.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: October 27, 1992
    Assignee: Rhone Poulenc Fibres
    Inventors: Pascal Barthelemy, Bruno Testard