Patents by Inventor Alfons J. S. van Biesen

Alfons J. S. van Biesen 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).

  • Foam boards produced using halogen-free blowing agents
    Patent number: 5576094
    Abstract: Extruded foam boards produced using halogen-free blowing agents from a styrene polymer thermoplastic matrix having a Vicat softening temperature VST B 50 of at most 100.degree. and a melt index MVI 200/5 of at least 5 ml/10 min are at least 20 mm, preferably more than 50 mm and in particular from 80 to 200 mm, thick. Preferred blowing agents for producing the foam boards are carbon dioxide alone, as well as mixtures of carbon dioxide and ethanol and/or dimethyl ether.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Julien N. R. Callens, Alfons J. S. van Biesen, Bernardo Wolff, Gerhard Alicke, Reinhold Weber, Franz-Josef Dietzen, Klaus Hahn