Patents by Inventor Josef Gotzig

Josef Gotzig 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).

  • Freeze-stabilized silica sol and its use as liquid for phosphate-based embedding compositions
    Patent number: 5028270
    Abstract: An aqueous silicic acid sol which is freeze-stabilized and which is useful for the production of phosphate-based embedding compositions used in dental technology, the aqueous silicic acid sol including from 25 to 50 weight percent of silicon dioxide; and from 2 to 10 weight % of a compound which is one of urea or a urea derivative and which has the general formula: ##STR1## wherein X and Y are groups selected from the group consisting of an --NH.sub.2 group and an --NHR group, in which R is an alkyl radical having from 1 to 4 carbon atoms.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: July 2, 1991
    Assignee: Giulini Chemie GmbH
    Inventors: Hans-Joachim Forster, Josef Gotzig, Jorg Brenn, Wolfgang Tucholke