Patents by Inventor Anja Obermüller

Anja Obermüller 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).

  • Stabilized aqueous polymer compositions and their use
    Patent number: 8962715
    Abstract: Disclosed are stabilized aqueous polymer compositions containing A) a stabilizing amount of a least a sulfur dye or containing a stabilizing amount of a sulfur dye with a compound comprising a heterocyclic system containing nitrogen and sulphur as ring heteroatoms and B) at least one polymer comprising groups which are capable of complex formation with ions. The aqueous polymer compositions are stabilized against thermal or other degradation processes of the polymer by addition of component A) to allow their use even under harsh conditions.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: February 24, 2015
    Assignee: Tougas Oilfield Solutions GmbH
    Inventors: Friedrich Engelhardt, Werner Spielmann, Christian Bremer, Anja Obermüller, Joachim Christian
  • Stabilized aqueous polymer compositions
    Patent number: 7842741
    Abstract: The aqueous polymer composition comprises a water soluble polymer having a molar weight of at least 104 Daltons and comprising functional groups which may form complexes with metal ions. The aqueous polymer compositions of this invention are stabilized against thermal or other degradation processes by addition of a phenothiazine compound to allow their use even under harsh conditions.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 30, 2010
    Assignee: Allessa Chemie GmbH
    Inventors: Friedrich Engelhardt, Christian Bremer, Anja Obermüller, Joachim Christian
  • Stabilized aqueous polymer compositions and their use
    Publication number: 20100075871
    Abstract: Disclosed are stabilized aqueous polymer compositions containing A) a stabilizing amount of a least a sulfur dye or containing a stabilizing amount of a sulfur dye with a compound comprising a heterocyclic system containing nitrogen and sulphur as ring heteroatoms and B) at least one polymer comprising groups which are capable of complex formation with ions. The aqueous polymer compositions are stabilized against thermal or other degradation processes of the polymer by addition of component A) to allow their use even under harsh conditions.
    Type: Application
    Filed: September 16, 2009
    Publication date: March 25, 2010
    Inventors: Friedrich Engelhardt, Werner Spielmann, Christian Bremer, Anja Obermüller, Joachim Christian