Patents by Inventor August T. Timmerman

August T. Timmerman 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
  • Conductive primers
    Patent number: 4623481
    Abstract: An epoxyester linear block oligomer made with n-1 moles fatty acid units terminated with carboxylic acid groups and n moles of epoxy oligomer, when filled with carbon black, is a particularly effective electrically conductive primer for use over organic-based composites to be electrostatically painted.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: November 18, 1986
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: Jozef T. Huybrechts, August T. Timmerman
  • Chip-resistant paint containing epoxyester linear block oligomer
    Patent number: 4602053
    Abstract: An epoxyester linear block oligomer made with n-1 moles fatty acid units terminated with carboxylic acid groups and n moles of epoxy oligomer is particularly suited for chip-resistant paints made with a low pigment volume concentration.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: July 22, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jozef T. Huybrechts, Ferdinand F. Meeus, August T. Timmerman