Patents by Inventor Alan Hufnagel

Alan Hufnagel 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).

  • Laminated Viscoelastic Damping Structure And Method Of Making The Same
    Publication number: 20090252989
    Abstract: The present invention provides a laminate structure for attenuating vibration and damping noise, and a method for manufacturing the same. The laminate structure includes first and second metallic constraining layers, and a viscoelastic layer disposed between and bonded to both constraining layers. The viscoelastic layer includes an amount of an external cross-linking agent, such as metal acetylacetonate, in excess of a stoichiometric quantity thereof. The laminate structure also includes a layer of 100% inorganic, hexavalent chrome free pretreatment, such as aqueous chromium (III) phosphate-silicate, disposed between and bonded to the viscoelastic layer and each constraining layer.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 8, 2009
    Applicant: MATERIAL SCIENCES CORPORATION
    Inventors: Rick Swanson, Alan Hufnagel