The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2015
Filed:
Sep. 16, 2009
Friedrich Engelhardt, Frankfurt, DE;
Werner Spielmann, Kelkheim, DE;
Christian Bremer, Bad Soden Salmünster, DE;
Anja Obermüller, Bruchkööel, DE;
Joachim Christian, Rödermark, DE;
Friedrich Engelhardt, Frankfurt, DE;
Werner Spielmann, Kelkheim, DE;
Christian Bremer, Bad Soden Salmünster, DE;
Anja Obermüller, Bruchkööel, DE;
Joachim Christian, Rödermark, DE;
Tougas Oilfield Solutions GmbH, Frankfurt, DE;
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.