Patents by Inventor Ljiljana Uzelac

Ljiljana Uzelac 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).

  • Paraffin dispersants for crude oil middle distillates
    Patent number: 6071993
    Abstract: A mixture contains(a) from 10 to 90% by weight of at least one imide of a copolymer based on an .alpha.-olefin and an ethylenically unsaturated dicarboxylic acid and a polyamine and(b) from 10 to 90% by weight of at least one reaction product of a poly(C.sub.2 -C.sub.20 -carboxylic acid) having a tertiary amino group with secondary aminesand is used as a paraffin dispersant in mineral oil middle distillates.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: June 6, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Wenderoth, Ljiljana Uzelac, Dieter Faul, Gabriele Dralle-Voss