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:
Apr. 30, 2013
Filed:
Dec. 15, 2005
Rosario Lizio, Rossdorf, DE;
Hans-ulrich Petereit, Darmstadt, DE;
Erna Roth, Darmstadt, DE;
Michael Damm, Roedermark, DE;
Ruediger Alexowsky, Nauheim, DE;
Rosario Lizio, Rossdorf, DE;
Hans-Ulrich Petereit, Darmstadt, DE;
Erna Roth, Darmstadt, DE;
Michael Damm, Roedermark, DE;
Ruediger Alexowsky, Nauheim, DE;
Evonik Roehm GmbH, Darmstadt, DE;
Abstract
The invention relates to a partly neutralized anionic (meth)acrylate copolymer consisting of radically polymerized units containing 25-95% by weight (meth)acrylic acid Cto Calkylesters and 5-75% by weight (meth)acrylate monomer with an anionic group, wherein 0.1 to 25% contained anionic groups are neutralized by a base. Said invention is characterized in that said base is embodied in the form of an cationic organic base whose molecular weight is greater than 150. A medical form containing said partly neutralized anionic (meth)acrylate copolymer and the use of said partly neutralized anionic (meth)acrylate copolymer for producing a medical form rapidly releasing an active substance having a determined pH value are also disclosed.