Patents by Inventor Marco J. A. Houben

Marco J. A. Houben 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 recovering monomeric units of a nylon from whole carpet
    Patent number: 7115671
    Abstract: The invention relates to a process for recovering monomeric units of a nylon from carpet material. The carpet material includes fibres containing nylon bound to a backing containing one or more non-nylon components. The carpet material contains between 15 and 35 wt. % of the nylon. The process includes: a) mechanically separating the carpet material into an enriched carpet mixture containing between 35 and 55 wt. % of said nylon and into a depleted carpet mixture having a lower content of nylon than the carpet material; and b) exposing the enriched carpet mixture to conditions at which depolymerization of the nylon is effected.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: October 3, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Antonius J. F. M. Courage, Marco J. A. Houben, Mathieu H. M. Mertens, Leonardus J. G. Raets
  • Process for recovering monomeric units of a nylon from whole carpet
    Publication number: 20030225170
    Abstract: The invention relates to a process for recovering monomeric units of a nylon from carpet material, said carpet material comprising fibres containing said nylon bound to a backing containing one or more non-nylon components, the carpet material containing between 15 and 35 wt.
    Type: Application
    Filed: June 3, 2002
    Publication date: December 4, 2003
    Inventors: Antonius J.F.M. Courage, Marco J.A. Houben, Mathieu H.M. Mertens, Leonardus J.G. Raets
  • Process for nylon depolymerization
    Patent number: 6498250
    Abstract: The invention relates to a process for nylon depolymerization, in which process a multi-component material, comprising nylon and one or more non-nylon components, is fed to a depolymerization zone in which depolymerization of at least part of said nylon is effected, resulting in a product stream and a residue, said product stream containing monomers of said nylon, said residue containing non-nylon components, wherein the nylon content in the residue is measured and used to control the depolymerization process.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: December 24, 2002
    Assignee: DSM N.V.
    Inventors: Leonardus J. G. Raets, Marco J. A. Houben, Michel J. G. Huys, Antonius C. Berghmans
  • Process for nylon depolymerization
    Publication number: 20020038023
    Abstract: The invention relates to a process for nylon depolymerization, in which process a multi-component material, comprising nylon and one or more non-nylon components, is fed to a depolymerization zone in which depolymerization of at least part of said nylon is effected, resulting in a product stream and a residue, said product stream containing monomers of said nylon, said residue containing non-nylon components, wherein the nylon content in the residue is measured and used to control the depolymerization process.
    Type: Application
    Filed: October 23, 2001
    Publication date: March 28, 2002
    Inventors: Leonardus J.G. Raets, Marco J.A. Houben, Michael J.G. Huys, Antonius C. Berghmans