Patents by Inventor Erik Swieringa

Erik Swieringa 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).

  • Process for determining the dye uptake of polyethylene terephthalate fibers
    Patent number: 6710869
    Abstract: The invention pertains to a process for determining the dye uptake of polyethylene terephthalate fibers in which the fibers are irradiated with high-intensity monochromatic light. A light-sensitive sensor is used to measure the Raman scattering and compare it with that of an earlier established model on the basis of Raman spectra of polyethylene terephthalate fibers of known composition and structure. A model is used to calculate the density, which constitutes a quantitative measure of the dye uptake. In the calculation use is made of measurement points from a number of regions in the spectral measuring region of 598 to 1900 cm−1.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: March 23, 2004
    Assignee: Acordis Industrial Fibers GmbH
    Inventors: Anton P. De Weijer, Robert J. Van Wijk, Erik Swieringa