Patents by Inventor Rudy Nwana

Rudy Nwana 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).

  • Combined sound and moisture vapor barrier sheet materials for flooring underlayment and construction applications
    Publication number: 20040197544
    Abstract: Flexible sheet materials having a foam layer and a film layer of polymer materials, at least one of the layers being formed from a filled polymer resin composition containing filler material comprising 30% to 65% by weight of the composition. The filled resin composition includes an ethylene copolymer such as ethylene vinyl acetate and may include other polymers such as polyethylene. The film layer provides a vapor barrier function. The layer having the filler provides a sound transmission loss. A preferred embodiment of an underlayment has a filler resin film layer of 6 to 30 mils thickness and a polymer foam layer of 75 mils thickness, the underlayment providing a sound transmission loss of at least about 2.5 dB at 1000 Hz.
    Type: Application
    Filed: April 22, 2004
    Publication date: October 7, 2004
    Applicant: Sealed Air Corporation
    Inventors: Natarajan S. Ramesh, Richard Freundlich, Parimal M. Vadhar, Rudy Nwana
  • Combined sound and moisture vapor barrier sheet materials for flooring underlayment and construction applications
    Publication number: 20030219582
    Abstract: Flexible sheet materials having a foam layer and a film layer of polymer materials, at least one of the layers being formed from a filled polymer resin composition containing filler material comprising 30% to 65% by weight of the composition. The filled resin composition includes an ethylene copolymer such as ethylene vinyl acetate and may include other polymers such as polyethylene. The film layer serves a vapor barrier function. The layer having the filler provides a sound transmission loss. A preferred embodiment of an underlayment has a filler resin film layer of 6 to 30 mils thickness and a polymer foam layer of 75 mils thickness, the underlayment providing a sound transmission loss of at least about 2.5 dB at 1000 Hz.
    Type: Application
    Filed: May 24, 2002
    Publication date: November 27, 2003
    Applicant: Sealed Air Corporation
    Inventors: Natarajan S. Ramesh, Richard Freundlich, Parimal M. Vadhar, Rudy Nwana
  • Production of reduced gas-permeable polyalkylene terephthalate films by strain induced crystallization
    Patent number: 6300469
    Abstract: PET with low gas permeability and good mechanical properties is produced utilizing strain-induced crystallization. This strain-induced crystallization process is utilized to produce PET films and sheets, among other products.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: October 9, 2001
    Assignee: Sealed Air Corporation (US)
    Inventors: Richard Freundlich, Rudy Nwana, Glenn Mathus