Patents by Inventor Holger Andreas

Holger Andreas 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).

  • Thermoplastic moulding compositions
    Patent number: 4131595
    Abstract: Copolyesters of terephthalic acid, 1,4-butanediol and an aliphatic dicarboxylic acid of the formula Ihooc--r--cooh (i)wherein R represents a divalent aliphatic hydrocarbon group containing not more than 34 carbon atoms, are eminently suitable as impact modifiers for polyalkylene terephthalates for improving the toughness properties.
    Type: Grant
    Filed: February 16, 1977
    Date of Patent: December 26, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Franz Breitenfellner, Holger Andreas