Patents by Inventor Walther W. Szubinski

Walther W. Szubinski 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).

  • Resin binders for foundry molding sands
    Patent number: 4585809
    Abstract: An aqueous dispersion of a copolymer comprising:(A) from 20 to 90 percent by weight of an unsaturated carboxylic acid of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 are hydrogen, alkyl, or --(CH.sub.2).sub.n COOM and M is a proton or an alkali metal or alkaline earth metal or an ammonium cation, and(B) from 10 to 80 percent of at least one other comonomer different from and copolymerizable with A; methods of making a ready-to-use foundry molding sand by mixing such a dispersion with sand; and such ready-to-use foundry molding sands.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: April 29, 1986
    Assignee: Rohm GmbH
    Inventors: Heinz-Jochen Auer, Wolfgang Klesse, Peter Quis, Walther W. Szubinski