Patents by Inventor Thorwald Born

Thorwald Born 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).

  • Cold-setting, polyurethane-based molding material binder
    Patent number: 4299751
    Abstract: Cold-setting, polyurethane-based molding material binder for producing molds and cones comprising phenolic polyol and a polyisocyanate characterized in that the polyol is dissolved in a polar high boiling solvent which has a Hansen hydrogen bonding solubility parameter of at least 3.5.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: November 10, 1981
    Assignee: Huttenes-Albertus Chemische Werke GmbH
    Inventor: Thorwald Born
  • Polyurethane-based binder system for the production of casting molds or cores
    Patent number: 4231914
    Abstract: Producing casting molds by blending flowable, granular material such as sand with a binder system including reactants to form polyurethane, i.e., polyisocyanates and polyols, and a solvent consisting of an ester having as its acid component an aliphatic dicarboxylic acid with from six to twelve carbon atoms, or a benzene polycarboxylic acid with at least three COOH groups; and having as its alcohol component an aliphatic, cycloaliphatic, arylaliphatic, or aromatic alcohol having from six to thirteen carbon atoms.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: November 4, 1980
    Inventors: Thorwald Born, Karl-Heinz Bruning