Patents by Inventor Guther Weymans

Guther Weymans 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).

  • Moulding compounds of polycarbonate mixtures having a high disperse solubility
    Patent number: 4980426
    Abstract: This invention relates to halogen-free binary mixtures of two fully aromatic polycarbonates each having a disperse solubility of from 18 to 35 (J/ccm).sup.1/2, in which both polycarbonates are of high molecular weight and each contains not more than 70 mol-% of bisphenol A. The invention further relates to the use of these mixtures for optical data stores and to moulded parts produced from the mixtures.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: December 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Berg, Guther Weymans, Ulrich Grigo, Ludwig Bottenbruch