Patents by Inventor Juliane Balzar

Juliane Balzar 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).

  • Water soluble, crosslinkable polymer compositions, their preparation and use
    Patent number: 4499232
    Abstract: The present invention relates to macromolecular compositions crosslinked by a novel bridge having the formula --NR.sup.x --CH.dbd.N--CO--. This novel bridge is obtained by reacting a macro-molecule, preferably a polymer, having at least two amidocarbonyl groups with a compound having at least two formylamido groups in an aqueous medium under highly acidic conditions. The crosslinking bridge formed by the reaction of this invention is produced in accord with the following formula: ##STR1## Compositions containing macromolecules having at least two amidocarbonyl groups and a compound having at least two formylamido groups can act as viscosifying or gelling agents for aqueous acids where when added to aqueous acids, crosslinking occurs. Acids gelled in this manner have important use in the recovery of oil and natural gas from subterranean formations.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: February 12, 1985
    Assignees: Cassella Aktiengesellschaft, Dresser Industries, Inc.
    Inventors: Friedrich Engelhardt, Steffen Piesch, Juliane Balzar, Jeffery C. Dawson