Patents by Inventor Michel A. C. Van Craenendonck

Michel A. C. Van Craenendonck 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).

  • Chiral absorbing structure
    Patent number: 5229773
    Abstract: An absorbing assembly for absorbing electromagnetic radiation in the range 10 MHz to 100 GHz comprises a lossy dielectric material and chiral elements disposed outside the lossy dielectric. The chiral elements may be springs, Mobius bands, irregular tetrahedra, tapering helical springs or handed non-planar forks. The lossy dielectric material may be in the form of a shaped structure e.g. for use in an anechoic chamber.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: July 20, 1993
    Assignee: Grace N.V.
    Inventors: Jan M. A. Dauwen, August T. Timmerman, Michel A. C. Van Craenendonck, Hugo F. Pues
  • Chiral absorber
    Patent number: 5202535
    Abstract: An absorbing assembly for absorbing electromagnetic radiation in the range 10 MHz to 100 GHz comprises a lossy dielectric material and chiral elements disposed outside the lossy dielectric. The chiral elements may be springs, moebius bands, irregular tetrahedra, tapering helical springs, screws or handed non-planar forks.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: April 13, 1993
    Assignee: Grace N.V.
    Inventors: Jan M. A. Dauwen, August T. Timmerman, Michel A. C. Van Craenendonck, Hugo F. Pues