Patents by Inventor Michael P. O'Callaghan, deceased

Michael P. O'Callaghan, deceased 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).

  • Expandable styrene polymers
    Patent number: 5096931
    Abstract: An expandable styrene polymer containinga) a styrene polymer,b) from 0.05 to 3% by weight, based on a), of water,c) from 0.001 to 1% by weight, based on a), of a finely divided organic polymer having a water absorption capacity of 10 g/g or more,d) from 0.5 to 8% by weight, based on a), of a C.sub.3 - to C.sub.6 -hydrocarbon, and, if desired,e) conventional additives in effective amounts, have good flow properties and low adhesion during prefoaming.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: March 17, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietmar Wittenberg, Klaus Hahn, Uwe Guhr, Hans Hintz, Michael P. O'Callaghan, deceased, Michael Riethues