Patents by Inventor Friedrich Knochel

Friedrich Knochel 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).

  • Aqueous release agent for the production of polyurethane moldings containing polyvinyl alcohol
    Patent number: 5319015
    Abstract: An aqueous release agent for the production of polyurethane moldings and more particularly of polyurethane foam moldings, is provided, which in combination with a release substance contain one or more specific polyvinyl alcohols. As such release substance the release agent preferably contains at least in part one or more unsaturated oligomeric or polymeric hydrocarbons with a molecular weight of at least 500 and iodine numbers of at least 60 optionally in the presence of foam stabilizers suitable for polyurethane systems.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: June 7, 1994
    Inventors: Manfred Gebhardt, Jiri Beranek, Friedrich Knochel