Patents by Inventor Ulrike Maassen

Ulrike Maassen 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).

  • Hot-melt adhesive for glueing DVDs
    Patent number: 6767424
    Abstract: The present invention relates to a process for preparing a digital versatile disc. The process of the present invention includes providing a hot melt adhesive containing at least one thermoplastic elastomer, at least one hydrocarbon resin, at least one poly-&agr;-olefin, and at least one polar wax, and providing at least two disc blanks. The hot melt adhesive is applied directly or indirectly to at least one of the blanks and the blanks are bonded together using the hot melt adhesive. The present invention also provides a digital versatile disc containing the hot melt adhesive.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: July 27, 2004
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Ruediger Butterbach, Ulrike Maassen, Dirk Bonke, Siegfried Kopannia
  • Swellable hotmelt adhesive
    Patent number: 6677394
    Abstract: Thermoplastic compositions based on a water-insoluble component of one or more thermoplastic copolymers and one or more resins with a saponification number and a water-soluble or water-dispersible component and a water-swellable component from the class of superabsorbers are suitable as water-swellable hotmelt adhesives. Such water-swellable hotmelt adhesives are preferably used for the production of watertight constructions, more particularly for the production of longitudinally watertight cable constructions.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: January 13, 2004
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Ruediger Butterbach, Ulrike Maassen, Siegfried Kopannia, Marcus Heemann
  • Hot-melt adhesive for gluing digital versatile discs
    Patent number: 6228456
    Abstract: Hotmelt adhesives with a melt viscosity of >100,000 mPas at 160° C. are suitable for bonding substrate halves in the production of digital versatile discs (DVDs) and afford major process-related advantages over known UV-curing adhesives. In their pigmented embodiment, they are able to combine the three functions of adhesive bonding, protecting the metallic reflection layer against corrosion and forming a covering background for a text/graphics layer.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: May 8, 2001
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Ruediger Butterbach, Ulrike Maassen, Siegfried Kopannia, Jean Louis Requin
  • Polyamide hotmelt adhesive
    Patent number: 5883172
    Abstract: A composition of matter useful as a hotmelt adhesive is provided. The composition is comprised of a polyamide based on dimerized fatty acid and having an amine value higher by at least two units than the acid value of said polyamide and a filler comprised of a carbonate. The filler is preferably comprised of fine particles of calcium carbonate. The adhesive is particularly useful for bonding metals, e.g. to plastics and the bonding of cables with multilayer sheaths, e.g. in optical cables and power cables.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: March 16, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Reimar Heucher, Siegfried Kopannia, Ulrike Maassen