Patents by Inventor Marilyn De Alwis

Marilyn De Alwis 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).

  • Acoustic tile and its use in vehicle sound proofing
    Publication number: 20040168853
    Abstract: An acoustic tile for damping vibration in a vehicle body panel, comprises a base layer (11) comprising a closed cell synthetic elastomeric foam bonded on one surface to a dense, stiff, non-cellular constraining layer (12). The base layer (11) preferably comprises nitryl rubber foam and the constraining layer preferable comprises an elastomeric/plastomeric polymer-bitumen blend.
    Type: Application
    Filed: April 12, 2004
    Publication date: September 2, 2004
    Inventors: Darren Aster Gunasekera, Marilyn De Alwis