Patents by Inventor Willem Marinus Stevels

Willem Marinus Stevels 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).

  • Reactive cationic resins for use as dry and wet strength agents in sulfite ion-containing papermaking systems
    Patent number: 8771469
    Abstract: This invention relates to resins useful for drainage in papermaking and the process of making paper using the resins. In particular the invention relates to glyoxalated copolymers of acrylamide containing significant amounts of cationic comonomer.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: July 8, 2014
    Assignee: Hercules Incorporated
    Inventors: Shane Cyr, Henk Bakker, Willem Marinus Stevels, Ronald Richard Staib
  • Reactive Cationic Resins for Use as Dry and Wet Strength Agents in Sulfite Ion-Containing Papermaking Systems
    Publication number: 20110056640
    Abstract: This invention relates to resins useful for imparting strength to paper, the process of incorporating these resins into paper and paper produced containing the resins. In particular the invention relates to resins useful for imparting dry-strength and wet strength to paper under conditions of high sulfite ion concentrations.
    Type: Application
    Filed: November 8, 2010
    Publication date: March 10, 2011
    Inventors: Shane Cyr, Henk Bakker, Willem Marinus Stevels, Ronald Richard Staib
  • Reactive cationic resins for use as dry and wet strength agents in sulfite ion-containing papermaking systems
    Patent number: 7828934
    Abstract: This invention relates to resins useful for imparting strength to paper, the process of incorporating these resins into paper and the paper produced containing the resins. In particular the invention relates to resins useful for imparting dry-strength and wet-strength to paper under conditions of high sulfite ion concentrations.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: November 9, 2010
    Assignee: Hercules Incorporated
    Inventors: Shane Cyr, Henk Bakker, Willem Marinus Stevels, Ronald Richard Staib
  • WASHABLE FILMIC LAMINATES
    Publication number: 20100139707
    Abstract: A process for removing a washable PSA laminate from a substrate is provided. The process comprises contacting the washable PSA laminate with water and optionally, a base, at a temperature sufficient to remove the washable PSA laminate from the substrate; wherein the washable PSA laminate comprises at least one facestock layer, at least one adhesive base layer, and at least one tackifier layer; wherein the facestock layer comprises at least one facestock material; wherein the adhesive base layer comprises at least one adhesive base polymer; wherein the tackifier layer comprises at least one tackifier and optionally at least one adhesive base polymer; wherein the tackifier layer is applied to the adhesive base layer side of the washable PSA laminate. Specifically, a process is provided for removing a washable PSA laminate from a bottle comprising contacting the washable PSA laminate with water and optionally, a base, at a temperature sufficient to remove the washable PSA laminate from the bottle.
    Type: Application
    Filed: September 8, 2009
    Publication date: June 10, 2010
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Lykele Jan Boonstra, Willem Marinus Stevels, Richard Lane, Gert-Jan van Ruler, Diana Wattel-Beenhouwer, Jacobus Gillis de Hullu, Hakan Saxen