Patents by Inventor Stefan Meinhard

Stefan Meinhard 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 the production of rigid foam comprising acrylic and/or methacrylic polymers without using fluorocarbons as a foaming agent
    Patent number: 5026738
    Abstract: Rigid foam is produced without using fluorocarbons as a foaming agent by ing an oligomer mixture of monomer and dimers to heximers, flame retardant, nitrogen liberating catalysts, cell regulating agents, foam stabilizer and foam regulator, crosslinking agents and wetting agent, preheating the mixture, and pouring the mixture into a mold, keeping the temperature at a value from 50.degree. to 70.degree. C. and upon completed polymerization removing the product from the mold.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: June 25, 1991
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventor: Stefan Meinhard