Patents by Inventor Jurg Keifer

Jurg Keifer 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).

  • Thermosetting mixtures of polyimide beta-amino crotonic acid derivative and polyamine which are stable on storage
    Patent number: 4161580
    Abstract: Mixtures which can be cured to give moulded materials having technically valuable mechanical and dielectric properties, characterized that they contain(a) polyimides of maleic acid or citraconic acid,(b) derivatives of .beta.-amino-crotonic acid, and optionally(c) polyamines.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: July 17, 1979
    Assignee: Ciba-Geigy Corporation
    Inventors: Theobald Haug, Jurg Keifer, Peter Ruf, Andre Schmitter