Patents by Inventor Bernard Koll

Bernard Koll 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).

  • Compound safety glass and PVB foil for the production thereof
    Patent number: 6887577
    Abstract: Known intermediate foils for compound glasses with improved sound insulation consist of several layers or special materials which cannot be further processed in conventional plants. The aim of the present invention is to provide an intermediate foil for compound glasses with improved sound insulation, whereby said foil consists of one layer as far as possible and is based upon PVB. Said intermediate foil allows for an improved sound insulation of the compound glasses in room temperature and has essentially unchanged working properties, whereby said compound glasses are produced from the intermediate foil. To resolve the aim of the invention, an intermediate foil is provided which contains: 50 to 80 wt. % PVB (partially acetalised polyvinyl alcohol), 20 to 50 wt. % of a softener mixture containing 30 to 70 wt.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: May 3, 2005
    Assignee: HT Troplast AG
    Inventors: Uwe Keller, Bernard Koll, Holger Stenzel