Patents by Inventor Andrew Treen

Andrew Treen 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).

  • Publication number: 20060202883
    Abstract: Please add the following abstract to the end of the application: An electromagnetic radiation absorber for absorbing radiation in the wavelength range ?min to ?max. The absorber has a conductor layer in contact with a dielectric layer. The conductor layer carries a plurality of apertures of sub-wavelength dimension and the thickness of the absorber is less than ?min/4n, where n is the refractive index of the dielectric. The dielectric layer may be sandwiched between two conductor layers, one of which has the structure described above. The invention is also directed to various articles comprising such an absorber.
    Type: Application
    Filed: July 19, 2004
    Publication date: September 14, 2006
    Inventors: Andrew Treen, Christopher Lawrence, John Sambles, Alastair Hibbins
  • Publication number: 20060008600
    Abstract: A material for use in covering objects for microwave heating comprises a substrate (1) substantially transparent to microwave radiation bearing an array of low emissivity metal patch elements (2) defining a frequency selective surface adapted to pass microwave radiation and reflect thermal infrared radiation. The patch elements (2), typically of aluminium, preferably have a characteristic dimension no greater than about 500 ?m and a spacing no greater than about 100 ?m, while the emissivity of the combined surface and frequency selective surface is preferably no greater than about 0.4. The material is useful as a packing for chilled or frozen microwavable foodstuffs, where its low emissivity assists in thermal insulation during storage or transportation and capturing of heat within the package during microwave cooking, where it can be safely used despite the presence of metal in the structure due to its configuration as a frequency selective surface.
    Type: Application
    Filed: September 5, 2003
    Publication date: January 12, 2006
    Inventors: Stephen Appleton, Andrew Treen, Ian Youngs