Patents by Inventor Wilhelm Mollenbruck

Wilhelm Mollenbruck 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).

  • Process for production of foamed shaped pieces with poreless surface made by the molding process
    Patent number: 4096219
    Abstract: A process for producing foam-shaped pieces having a poreless and smooth surface from particulate expandable styrene polymer which comprises the steps of heating not prefoamed particles of expandable styrene polymer to a temperature between 100.degree. and 170.degree. C. under a pressure of between 3 and 30 bar to cause melting of the polymer cooling the melt polymer to temperatures of about 10.degree. to 40.degree. C. above the softening point of the styrene polymer, enlarging the capacity of the mold in which the particles are melted, expanding the resulting mold melt material without supplementary external delivery of heat and thereafter cooling the mold to about ambient temperature followed by removal of the shaped foamed piece.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: June 20, 1978
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Wilhelm Mollenbruck, Werner Bollmann